diff --git a/.gitignore b/.gitignore
index 2849ac6..d8f583f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -106,7 +106,7 @@ ENV/
 .idea/
 
 # VS Code launch config
-.vscode/launch.json
+#.vscode/launch.json
 
 # Visual Studio Code settings
 #.vscode/
diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..f2531e8
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,31 @@
+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Python Debugger: Current File",
+      "type": "debugpy",
+      "request": "launch",
+      "program": "${file}",
+      "console": "integratedTerminal"
+    },
+    {
+      "name": "sortlists.py",
+      "type": "debugpy",
+      "request": "launch",
+      "program": "sortlists.py",
+      "cwd": "${workspaceFolder}/parsedmarc/resources/maps",
+      "console": "integratedTerminal"
+    },
+    {
+      "name": "find_unknown_base_reverse_dns.py",
+      "type": "debugpy",
+      "request": "launch",
+      "program": "find_unknown_base_reverse_dns.py",
+      "cwd": "${workspaceFolder}/parsedmarc/resources/maps",
+      "console": "integratedTerminal"
+    }
+  ]
+}
diff --git a/.vscode/settings.json b/.vscode/settings.json
index a5618e4..27e19b5 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -109,6 +109,7 @@
         "setuptools",
         "smartquotes",
         "SMTPTLS",
+        "sortlists",
         "sortmaps",
         "sourcetype",
         "STARTTLS",
diff --git a/build.sh b/build.sh
index db58333..8d38d36 100755
--- a/build.sh
+++ b/build.sh
@@ -19,7 +19,7 @@ if [  -d "./../parsedmarc-docs" ]; then
 fi
 cd ..
 cd parsedmarc/resources/maps
-python3 sortmaps.py
+python3 sortlists.py
 echo "Checking for invalid UTF-8 bytes in base_reverse_dns_map.csv"
 python3 find_bad_utf8.py base_reverse_dns_map.csv
 cd ../../..
diff --git a/parsedmarc/resources/maps/base_reverse_dns_map.csv b/parsedmarc/resources/maps/base_reverse_dns_map.csv
index 8b3950c..91637b8 100644
--- a/parsedmarc/resources/maps/base_reverse_dns_map.csv
+++ b/parsedmarc/resources/maps/base_reverse_dns_map.csv
@@ -1,1780 +1,1794 @@
-base_reverse_dns,name,type
-1000island.net,1000 Island,ISP
-101-clientes-izzi.mx,Izzi Telecom,ISP
-118-clientes-izzi.mx,Izzi Telecom,ISP
-163data.com.cn,China Telecom,ISP
-197-clientes-izzi.mx,Izzi Telecom,ISP
-1e100.net,Google,Technology
-263.net,263,Email Provider
-2day.kz,2DAY Telecom LLP,ISP
-360group.es,360 group,Web Host
-3bb.in.th,3BB,ISP
-3dprintingindustry.com,3D Printing Industry,Industrial
-3kt.eu,3K Technology,MSP
-4gbhost.com,4GBHost,Web Host
-82-165-19-207.plesk.page,Digital Health Portal,Healthcare
-93-clientes-zap-izzi.mx,Izzi Telecom,ISP
-98-clientes-izzi.mx,Izzi Telecom,ISP
-a2hosting.com,A2Hosting,Web Host
-aaltoscientific.com,Aalto Scientific,Healthcare
-aams6.jp,"BroadBand Security, Inc",MSSP
-ab-group.biz,AsiaBell,ISP
-abchk.net,ABCHK,Web Host
-abnormal-email.com,Abnormal AI,Email Security
-academiasupport.org,Academia Support Japan,Education
-accessmedlab.com,Access Medical Labs,Healthcare
-acelerate.net,AXS Bolivia S. A.,ISP
-acessecomunicacao.com.br,Acesse,ISP
-acessoline.net.br,Alt Telecom,ISP
-activegate-ss.jp,Active! gate SS,Email Security
-adairit.com,Adair IT,MSP
-additionnetworks.net,CherryRoad Technologies,MSP
-admintek.net,Admintek,Web Host
-admintekcr.net,Admintek,Web Host
-admiral.ne.jp,ASJ,ISP
-adnhosting.ca,ADN Communications,Web Host
-adnsl.com,ADN Telecom,ISP
-adp.com,ADP,Finance
-adrz.nl,Adrz,Healthcare
-adsl-pool.sx.cn,China Unicom,ISP
-adventconstructions.co.tz,Advent Construction Limited,Industrial
-aeroinc.net,The Areo Group,Industrial
-aesbg.net,AESNET,ISP
-aeza.network,Aeza,Web Host
-af-k.de,I-NetPartner GmbH,ISP
-afghan-wireless.com,Afghan Wireless,ISP
-afnet.net,AFNET,ISP
-afriminesa.com,Afrimine Southern Africa,Industrial
-agencia-atlas.com,Groupo Atlas,Logistics
-agoda.com,Agoda,Travel
-aichi-colony.jp,Aichi Developmental Disability Center,Healthcare
-aigmedical.com,Affiliates in Gastroenterology,Healthcare
-aila.org,American Immigration Lawyers Association,Nonprofit
-aircleaningspecialists.com,"Air Cleaning Specialists, Inc.",Industrial
-aircomusa.com,FaxPipe (Formerly AirCom USA),SaaS
-airgas.com,Airgas,Industrial
-airtel.co.zm,Airtel,ISP
-airtel.in,Airtel,ISP
-airtelbroadband.in,Airtel,ISP
-airtelkenya.com,Airtel,ISP
-ajrmexico.net,AJR,Logistics
-ajusa.com,AJ-USA,Retail
-aknet.kg,AkNet,ISP
-akura.ne.jp,Akura,Logistics
-albatros.uz,Albatros Health Care,Healthcare
-alembic.co.in,Alembic Pharmaceuticals,Healthcare
-alestra.net.mx,Alestra,ISP
-aliyun.com,Alibaba Cloud,Web Host
-alliancebroadband.in,Alliance Broadband,ISP
-almanet.net,Alma Communications,ISP
-alpha-mail.net,Otsuka Corporation,MSP
-alpha-prm.jp,Otsuka Corporation,MSP
-altel.kz,Atal,ISP
-altmanadvisors.com,Altman Advisors,Finance
-altovalenet.com.br,Alto Vale Net,ISP
-alwaysdata.com,alwaysdata,Web Host
-amazon.com,Amazon,Technology
-amazonaws.com,Amazon Web Services (AWS),PaaS
-amazonses.com,Amazon SES,SaaS
-ambisys.net,Ambisys,Healthcare
-america.net,America.net,Web Host
-americanam.org,American Advanced Management,Healthcare
-amethyst.co.jp,Amethyst,Healthcare
-ampernet.com.br,Ampernet,ISP
-amplia.co.tt,AMPLIA,ISP
-anet.net.th,ANET,ISP
-antelecom.net,Antelecom,ISP
-anti-spam-premium.com,Liquid Web,Web Host
-antilles-sante.com,AAS Medical,Healthcare
-antispamcloud.com,N-able,Email Security
-antispameurope.com,Hornetsecurity,Email Security
-anylogic.com,AnyLogic,SaaS
-aplusgroup.net,A Plus International,Healthcare
-apple.com,Apple,Email Provider
-applicationx.net,Application X,MSP
-appriver.com,OpenText AppRiver,Email Security
-aps-inc.co.jp,Arahi Polyslider,Industrial
-aqmhost.net,AqmHost,Web Host
-aragon.es,Government of Aragon,Government
-archerirm.us,Archer GRC,SaaS
-arena.ne.jp,WebARENA,ISP
-arizona.edu,University of Arizona,Education
-arpinet.am,Arpinet,ISP
-artehosting.com.mx,Artehosting,Web Host
-aruba.it,Aruba.it,Web Host
-as42831.net,UK Dedicated Servers,Web Host
-asahikawa-med.ac.jp,Asahikawa Med,Healthcare
-ashtelstudios.com,Ashtel Studios,Healthcare
-asiaitserver.com,Asia IT Solution Co.,MSP
-asianet.co.th,Ttur Internet Corporation,ISP
-askbis.com,BIS,Web Host
-asl2.liguria.it,ASL2,Healthcare
-asmecal.it,ASMENET CALABRIA,Government
-assaytechnology.com,Assay Technology,Industrial
-assentportal.com,Assent,SaaS
-assp.org,American Society of Safety Professionals,Healthcare
-asteria.com,Asteria,SaaS
-atmailcloud.com,atmail,Email Provider
-ats.ca,ATS Healthcare,Healthcare
-atw.ne.jp,ATW,Web Host
-au-net.ne.jp,KDDI,ISP
-au.com,au,ISP
-auone-net.jp,KDDI,ISP
-aussiebb.com.au,Aussie Broadband,ISP
-autotask.net,Kaseya,SaaS
-averypartners.net,Avery Partners,Healthcare
-avis.ne.jp,Densan Avis,ISP
-aviso.ci,Orange,ISP
-avnam.net,VPS Argentina,Web Host
-awasr.om,Awasr,ISP
-awm.com.tr,Yöncü Bilişim Çözümleri Limited Şirketi,Web Host
-axspace.com,AXspase,Web Host
-axtel.net,Axtel,ISP
-azeronline.com,Azeronline,ISP
-azteca-comunicaciones.com,Aztec Communications Columbia,ISP
-azure.com,Microsoft Azure,PaaS
-backland.net,Backland Communications,MSP
-balifiber.id,BaliFiber,ISP
-banchero.org,Bancharo Disability Services,Healthcare
-barracuda.com,Barracuda,Email Security
-barvanet.kz,Barvanet,MSP
-basketnews.lt,BasketNews,Sports
-bayada.com,BAYADA Home Health Care,Healthcare
-bayer.de,Bayer,Healthcare
-bayoulandcs.com,Bayouland Computer Solutions,MSP
-bbemaildelivery.com,BombBomb,Marketing
-bbnetup.com.br,BBNET UP,ISP
-bbtel.com,BBTEL,ISP
-bcs.org,BCS,Nonprofit
-beaumont.org,Corewell Health (Formerly Beaumont),Healthcare
-bell.ca,Bell Canada,ISP
-bell.net,Bell Canada,ISP
-benkan.co.jp,Benkan,Industrial
-berea.edu,Berea College,Education
-betterhomeowners.com,InTouch Systems,Marketing
-bezeqint.net,Bezeq International,ISP
-bigcommerce.net,BigCommerce,SaaS
-biglobe.ne.jp,BIGLOBE,ISP
-bigscoots.com,BigScoots,Web Host
-biodose.com,BioDose,Healthcare
-biotika.sk,Biotika,Healthcare
-bisno1.co.jp,"Bis Co., Ltd.",Construction
-bisv.ru,Bisv.ru,ISP
-blackfriarsam.com,Blackfriars Asset Management,Finance
-blacknight.com,Blacknight Solutions,Web Host
-blanksoft.dev,BlankSoft,MSP
-blitzmediahosting.ca,Blitz Media,Web Host
-bls.gov,U.S. Bureau of Labor Statistics,Government
-bluehost.com,Bluehost,Web Host
-bluemission.net,Blue Mission,Web Host
-bluesea.org,Blue Sea Foundation,Marketing
-bluetie.com,BlueTie,MSP
-bnpparibas.fr,Banque BNP Paribas,Finance
-bohc.co.jp,Benefit One Inc.,Retail
-bookingtimes.com,BookingTimes,SaaS
-bostrad.com,Bostrad Supply Chain Ltd,Logistics
-bov.com,Bank of Valletta,Finance
-bracnet.net,BRACNet Limited,ISP
-brasildigital.net.br,Brasil Digital Telecom,ISP
-bravehost.com,Bravenet,Web Host
-bravenet.com,Bravenet,Web Host
-braveriver.com,Brave River,MSP
-breakthru.net,BreakThru,MSP
-bredband2.com,Broadband2,ISP
-breezein.net,BRIZ,ISP
-breezelineohio.net,Breezeline,ISP
-bright.net,CNI,ISP
-brightspace.com,D2l Brightspace,SaaS
-brinkster.com,Brinkster,Web Host
-brisanet.net.br,Brisianet,ISP
-broadridge.com,Broadridge,Finance
-btc-net.bg,Viacom,ISP
-btopenworld.com,BT,ISP
-bugtusselwireless.com,Bug Tussel,ISP
-bulsat.com,Bulsatcom,ISP
-bumblebeelinens.com,Bumbletree Linens,Retail
-bunkaren.or.jp,Japan Culture and Welfare Federation of Agricultural Cooperatives,Agriculture
-burnhamholdings.com,Burnham Holdings,Industrial
-buroserv.net.au,Brunoserv,ISP
-cable.net.co,Cablenet,ISP
-cablecom.ch,UPC,ISP
-cableonda.net,Cable Onda,ISP
-cabletel.com.mk,A1,ISP
-cablevision.net.mx,Izzi Telecom,ISP
-cairohost.com,Black Host,Web Host
-caiway.nl,Caiway,ISP
-calero.com,Calero,MSP
-calpoly.edu,Cal Poly,Education
-calvin.edu,Calvin University,Education
-canonet.ne.jp,Canonet,MSP
-carandainet.com.br,CN Internet,ISP
-cardhealth.com,Cardinal Health,Healthcare
-cardinal.com,Cardinal Health,Healthcare
-cardinalhealth.com,Cardinal Health,Healthcare
-carecentrix.com,CareCentrix,Healthcare
-carrierzone.com,carrierzone,Email Security
-carsforkids.org,Cars For Kids,Nonprofit
-case.edu,Case Western Reserve University,Education
-castrum.com.br,Castrum Internet,ISP
-catnet.jp,Honjo Cable,ISP
-cbe.ae,CBE,Construction
-cbwchc.org,Charles B. Wang Community Health,Healthcare
-ccc-group.com,Canada Colors and Chemicals Limited (CCC),Industrial
-cdbhospital.com,CBD Hospital,Healthcare
-celeste.fr,CELESTE,ISP
-centerasecurity.com,Centera Email Defence,Email Security
-centerasecurity.dk,Centera Email Defence,Email Security
-centralesupelec.fr,CentraleSupélec,Education
-centralinteractiva.com.mx,Central Interactiva,Marketing
-centralnetx.com.br,Centralnet,ISP
-centurylink.com.pe,Cirion,MSP
-certronic.com.ar,Certronic,SaaS
-ch-saintcalais.fr,Centre Hospitalier du Mans,Healthcare
-chaiyohosting.com,Chaiy oHosting,Web Host
-changethatup.com,Change That Up,Healthcare
-charter.net,Charter,ISP
-chiba-u.jp,Chiba University,Education
-chikamori.com,Chikamori Health Care Group,Healthcare
-childrenscolorado.org,Children's Hospital Colorado,Healthcare
-childrenshospital.org,Boston Children's Hospital,Healthcare
-chinamobile.com,China Mobile,ISP
-chinaunicom.cn,China Unicom,ISP
-chinaxingye.com,Suzhou Sinye Materials Technology,Industrial
-ciliotech.com,Cilio,SaaS
-cimcorp.com,Cimcorp,Industrial
-circleamedical.com,Circle A Medical,Healthcare
-cirrushosting.com,Cirrus Hosting,Web Host
-cisco.com,Cisco,Technology
-cityemail.com,CityEmail,Email Provider
-ckt.net,Craw-Kan Telephone Cooperative,ISP
-clarix.com,Clarix,MSP
-claro.com.do,Claro,ISP
-claro.com.ec,Claro,ISP
-claro.net.do,Mail2World,Email Provider
-claytonindustries.com,Clayton Industries,Industrial
-clearwave.com,Clearwave Fiber,ISP
-clemson.edu,Clemson University,Education
-clicktelecomunicacoes.com.br,Click Telecomunicações,ISP
-climaideal.com,Clima Ideal,Retail
-clinique-saint-george.com,Polyclinique Saint George,Healthcare
-cloud-sec-av.com,Check Point Avanan,Email Security
-cloudezapp.io,EmailHeads.NET,Marketing
-cloudfilter.net,Proofpoint Cloudmark,Email Security
-cloudflare-email.com,Cloudflare,Email Security
-cloudflare-email.net,Cloudflare,Email Security
-cloudflare.net,Cloudflare,SaaS
-clouditalia.com,Retelit,Web Host
-cloudwaysapps.com,Cloudways,Web Host
-cloudwebhosting.com,NameHero,Web Host
-clsvrsystems.net,GMO Cloud,IaaS
-clubexpress.com,ClubExpress,SaaS
-cniteam.com,CNI,ISP
-cod.edu,College of DuPage,Education
-codetel.net.do,codetel.net.do,ISP
-coeficiente.net.mx,Coeficiente,ISP
-coex.co.kr,COEX,Marketing
-cogeco.ca,Cogeco,ISP
-cogeco.net,Cogoco,ISP
-cognizant.com,Cognizant,Technology
-collectivhosting.com,Collectiv,Web Host
-colocrossing.com,ColoCrossing,ISP
-colos.kz,IFC COLOS,Logistics
-combell.com,Combell,Web Host
-comcast.net,Comcast,ISP
-comcastbusiness.net,Comcast Business,ISP
-comfori.com,Comfori,SaaS
-comline.com,West Coast Internet (WCI),ISP
-communitect.com,Solutionreach,SaaS
-communitymedical.org,Community Medical Centers,Healthcare
-complemar.com,Complemar,Logistics
-compliancearchitects.net,Compliance Aarchitects,Healthcare
-compu-type.net,Compu-Type,MSP
-computerguyz.ca,Computer Guyz,MSP
-computronics.com,Computronics,Technology
-comune.livorno.it,Città di Livorno,Government
-comunitel.net,Vodafone,ISP
-concurcompleat.com,Concur Compleat,SaaS
-concursolutions.com,SAP Concur,SaaS
-condosites.net,CondoSites,SaaS
-conoha.ne.jp,ConoHa,Web Host
-consolidatedlabel.com,Consolidated Label,Print
-constantcontact.com,Constant Contact,Marketing
-consumermedsafety.org,Institute for Safe Medication Practices,Healthcare
-contaboserver.net,Contabo,Web Host
-convention.co.jp,Japan Convention Services,Marketing
-convergent-interfreight.com,Convergent Interfreight,Logistics
-convergentindia.com,Convergent Wireless,MSP
-coopenet.com.ar,Coopenet,ISP
-corbina.ru,PJSC VimpelCom,ISP
-corblock.com,Corblock,Industrial
-corewellhealth.org,Corewell Health,Healthcare
-cornell.edu,Cornell University,Education
-cotecal.com.ar,Cotecal,ISP
-cotton-warehouse.com,Cotton Warehouse Classic Cars,Automotive
-coucou-networks.fr,Free Mobile,ISP
-cox.net,Cox Communications,ISP
-cp247.net,M247,Web Host
-cpanelhost.cl,cPanelHost,Web Host
-cpi.ad.jp,CPI,Web Host
-cpi340b.com,Contract Pharmacy Insight,Healthcare
-cpsinet.com,TruBridge,Healthcare
-creehan.com,Inovalon (Formerly Creehan & Company),Healthcare
-crossinx.com,Unifiedpost Group,SaaS
-crowncloud.net,CrownCloud,Web Host
-crxmgmt.com,The Medicine Shoppe Franchisee,Healthcare
-csloxinfo.com,CSL,MSP
-csod.com,Cornerstone,SaaS
-ctbcbank.com.ph,CTBC Bank (Philippines) Corp.,Finance
-ctbctelecom.com.br,Algar Telecom,ISP
-ctl.one,CenturyLink,ISP
-cubiespot.net.id,Cubiespot,ISP
-cuenote.jp,Cuenote,SaaS
-cvent-planner.com,Cvent,SaaS
-cvtsv.com,Cvent,SaaS
-cwmc.com.br,CWMC,ISP
-cwru.edu,Case Western Reserve University,Education
-cyberfuel.com,Cyberfuel.com,Web Host
-cyberlynk.net,CyberLynk,MSP
-cybermail.jp,CyberMail,Email Provider
-cybernextech.co.th,CYBER NEXTECH,Web Host
-cyfrowypolsat.pl,Polsat Box,ISP
-cyon.net,Cyon,Web Host
-d2s.cloud,d2s.cloud,Web Host
-daemonmail.ner,DaemonMail,Email Provider
-dailyinvesthub.com,Daily Invest Hub,Finance
-dailyrazor.com,DailyRazor,Web Host
-damcogroup.com,Damco Solutions,MSP
-damel.com,Damel Group,Food
-daraju.com,Daraju,Healthcare
-darysoft.com,Dary Web Designs,Web Host
-datanat.com,Datanational Corporation,MSP
-datawagon.net,DataWagon,Web Host
-dattar.com.ar,Dattar,MSP
-dattaweb.com,HostMar,Web Host
-daystar.io,Daystar Email Service,Email Provider
-ddccommunications.com,DDC public affairs,Marketing
-default-host.net,INHOSTED LP,Web Host
-delhitel.net,Delhi Telephone Company,ISP
-deliverychain.io,Delivery Chain,SaaS
-deskwing.net,DESKWING,Email Provider
-dexanet.co.id,Dexanet,ISP
-dfn.nl,DELTA Fiber,ISP
-dgsys.es,DGsys,Web Host
-dhl.com,DHL,logistics
-diakovere.de,DIAKOVERE,Healthcare
-digijadoo.net,Jadoo Digital,ISP
-digikabel.hu,One Hungary (Formerly DIGI),ISP
-digitalairstrike.com,Digital Air Strike,Marketing
-digiturunc.com,Digiturunc,Web Host
-dimenoc.com,HostDime.com,Web Host
-directnic.net,Directnic.com,Web Host
-directwifi.com.br,Direct Internet,ISP
-discovergreene.com,"Greene County, New York",Government
-disenosweb.mx,Hive Studio,Web Host
-dishemail.com,DISH,ISP
-dji.com,DJI,Technology
-dlivry.co,Twilio SendGrid,Marketing
-dmmhosts.com,DMM Hosts,Web Host
-dnchosting.com,Directnic,Web Host
-dnns.net,No-IP Dynamic DNS,Web Host
-dnsthai.com,Aptum Technologies,MSP
-doctors.org.uk,Doctors.net.uk,Healthcare
-domaincentral.com.au,Domain Central,Web Host
-domaineinternet.ca,Rapidenet Canada,Web Host
-domainit.com,DomainIt,Web Host
-donpac.ru,Rostelecom,ISP
-dosscloudservices.com,Doss Business Systems,MSP
-doteasy.com,Doteasy,Web Host
-dotinternetbd.com,DOT Internet,ISP
-dotroll.com,DotRoll,Web Host
-downloaddatarecovery.com,KernelApps,Technology
-draminski.com,Dramiński Technology,Healthcare
-dreamcompute.com,Dreamhost,Web Host
-dreamhost.com,Dreamhost,Web Host
-dreamhostps.com,Dreamhost,Web Host
-drive.ne.jp,Drive Network,Web Host
-drjapan-jp.com,"Dr. Japan Co., Ltd.",Healthcare
-dslon.ws,Dslon Wireless,ISP
-dsmc.or.kr,Keimyung University Dongsan Medical Center,Healthcare
-dsw.com,DSW,Retail
-dtel.com.br,Dtel Telecom,ISP
-dts-security.de,DTS,MSP
-duck.com,DuckDuckGo,Search Engine
-dvcotechnology.com,Cision,Marketing
-dwgreen.com,DW Green Company,Marketing
-dwit.co.kr,Daewon Information Technology Co.,MSP
-dynadot.com,Dynadot,Web Host
-dynamic-mytachyon.in,Tachyon Communications,ISP
-dyspatchit.net,Dyspatchit,Marketing
-e-mmunity.net,VIPRE,Email Security
-e2ma.net,Emma,Marketing
-eaglecom.net,Vyve Broadband,ISP
-eastern-tele.com,Eastern Communications,ISP
-easterndsl.com.ph,Eastern Communications,ISP
-eastlink.ca,Eastlink,ISP
-easy-hebergement.net,Easy-Hébergement,Web Host
-easydns.com,easyDNS,Web Host
-easyweb.com,easyDNS,Web Host
-eboundhost.com,eBoundhost,Web Host
-echolabs.net,Echo Labs,MSP
-echoworx.net,Echoworx,Email Security
-ecm8.com,Campaign Master (UK),Marketing
-ecritel.net,Ecritel,MSP
-edgepark.com,Edgepark,Healthcare
-edu.com,InstructionalAssistant,SaaS
-eduneering.com,UL EHS training,SaaS
-egov.com,Tyler Technologies,SaaS
-egress.cloud,Egress Software,Email Security
-egs-seg.gc.ca,Canada Government Electronic Directory Services (GEDS),Government
-ehafconsulting.org,EHAF Consulting Engineers,Construction
-ehime-u.ac.jp,Ehime University,Education
-ehostsolution.net,E Host Solution,Web Host
-eigbox.net,Newfold Digital,Web Host
-einsteinmail.com,Einstein Industries,Web Host
-eircom.net,Eir,ISP
-ejpress.com,eJournalPress,SaaS
-elcat.kg,ElCat,ISP
-elcom.ru,Rostelcom,ISP
-electric.net,VIPRE,Email Security
-elevatedstudios.tech,Elevated Studios,Web Host
-eleven.mx,Eleven Marketing Labs,Marketing
-elive.net,Elive,Web Host
-ellipse.net,Ellipse,MSP
-elmecnet.net,Elmec Informatica,MSP
-elnk.net,Earthlink,ISP
-email-od.com,SocketLabs,SaaS
-emailarray.com,Emailarray,Email Provider
-emailowl.com,NameSilo,Web Host
-emailsecurity.app,Mesh Security,Email Security
-emailservice.io,Mailprotector,Email Security
-emailsrv.net,Mailprotector,Email Security
-emailsrvr.com,Rackspace Email,Email Security
-emberpoint.com,Ember Point,SaaS
-empaquesmundiales.com,Empaques Mundiales,Industrial
-emporiaresearch.com,Emporia,SaaS
-emsecure.net,Selligent,Marketing
-emsend2.com,ActiveCampaign,Marketing
-encrypttitan.net,EncryptTitan,Email Security
-enguard.com,EnGuard,Email Security
-eninetworks.com,ENI Networks,ISP
-entelchile.net,Entel,ISP
-entelvias.com.br,Entelvias,ISP
-enternetprovedor.com.br,Enternet,ISP
-entrata.com,Entrata,SaaS
-entrustedmail.net,EntrustedMail,Email Security
-eonemedia.com,eOneMedia,Photography
-epicpc.com,Epic Health,Healthcare
-epicura.be,EpiCURA,Healthcare
-epsl1.com,Publicis Groupe,Marketing
-erie.gov,"Erie County, New York",Government
-erlabrunn.de,Kliniken Erlabrunn,Healthcare
-ertelecom.ru,ER-Telecom,ISP
-eskerondemand.com,Esker,SaaS
-etc.uz,East Telecom,ISP
-etex.net,Etex,ISP
-etik-cloud.com,Infomaniak,IaaS
-etipres.com,ETIPRES,Print
-etius.jp,WebArena,Web Host
-etouches.com,Stova,SaaS
-eventsairmail.com,EventsAir,SaaS
-evernet.net.co,Evernet,ISP
-evertecinc.com,Evertec,Finance
-evertecpr.com,Evertec,Finance
-exacthosting.com,Exact Hosting,Web Host
-exactt.com,Salesforce Marketing Cloud (Formerly ExactTarget),Marketing
-exacttarget.com,Salesforce Marketing Cloud (Formerly ExactTarget),Marketing
-execulink.net,Execulink Telecom,ISP
-expedia.net,Expedia,Travel
-explori.com,Explori,Event Planning
-expositltd.com,Exposit Ltd.,MSP
-express.com.ar,Express Telecomunicaciones,ISP
-ezorg.nl,E-Zorg,Healthcare
-fap.mil.pe,La Fuerza Aérea del Perú (FAP),Government
-fast.net.id,Linknet-Fastnet,ISP
-fastnet.kg,FastNet,ISP
-fastspeed.dk,Fastspeed,ISP
-feasa.ie,Feasa,Industrial
-fedex.com,FedEx,Logistics
-ferreterialindavista.com,Somos Ferreteria Lindavista,Retail
-fetnet.net,FETNet,ISP
-fgl.com.mx,Francisco Garcia Lopez,Healthcare
-fiberhub.com,FiberHub,ISP
-fibertel.com.ar,Personal,ISP
-fibextelecom.net,Fibex Telecom,ISP
-fibralink.net.br,Fibralink,ISP
-fibrenoire.ca,fibrenorie,ISP
-fireeyecloud.com,FireEye,Email Security
-fireeyegov.com,FireEye (Government),Email Security
-firstcloudsecurity.net,CyberCision,Email Security
-fisherpaykel.com,Fisher & Paykel,Retail
-fisquare.com,Infince,SaaS
-flashmaistelecom.com.br,Flash + Telecom,ISP
-fleetviolations.com,ATS Processing Services,Logistics
-flinnsci.com,Flinn Scientific,Healthcare
-floridaurologypartners.com,Florida Urology Partners,Healthcare
-flywheelsites.com,Flywheel,Web Host
-fmc-na.com,Fresenius Medical Care,Healthcare
-fmcna.com,Fresenius Medical Care,Healthcare
-fmu.ac.jp,Fukushima Medical University,Education
-fonacit.gob.ve,Fonacit,Government
-foodtecsolutions.com,FoodTec Solutions,SaaS
-formassembly.com,FormAssembly,SaaS
-forpsi.com,Forpsi,Web Host
-forthnet.gr,Nova,ISP
-fortimail.com,Fortinet FortiMail,Email Security
-fortimailcloud.com,Fortinet FortiMail Cloud,Email Security
-forwardemail.net,ForwardEmail.net,Email Provider
-fourseasonspediatrics.com,Four Seasons Pediatrics,Healthcare
-francedns.com,Eurofiber France,ISP
-franchisemail.net,FranConnect,SaaS
-franweb.net.br,FRAN WEB,ISP
-freehostia.com,Freehostia,Web Host
-freehosting.com,FreeHosting.com,Web Host
-freemail.hu,Freemail bejelentkezés,Email Provider
-frontiir.com,FRONTiiR,MSP
-fuertehoteles.com,Fuerte Group Hotels,Travel
-fujibake.co.jp,Fuji Bakelite,Industrial
-fujita-hu.ac.jp,Fujita Health University,Healthcare
-funeralone.net,funeralOne,SaaS
-fuse.net,Altafiber (Formerly Cincinnati Bell),ISP
-fusionconnect.com,Fusion Connect,MSP
-future-bridge.eu,Future Bridge Events,Marketing
-gaggle.net,Gaggle,SaaS
-gallerycollection.com,The Gallery Collection,Retail
-gandi.net,Gandi.net,Web Host
-gastrogainesville.com,Gastroenterology Associates of Gainesville,Healthcare
-gatormail.co.uk,Spotler,Marketing
-gazella.es,Orix Systems,MSP
-gci.net,GCI,ISP
-gcicom.net,Nasstar,MSP
-gcrcompany.com,GCR Company,MSP
-gearhost.com,GearHost,Web Host
-gen2fund.com,Gen II,Finance
-generalinformatix.net,General Informatix,Technology
-genoray.com,GENORAY,Healthcare
-genstarnetcable.com,Gennstar Network Solutions,ISP
-gerberlife.com,Gerber Life Insurance,Finance
-ggsv.jp,Techorus,Web Host
-ghm-grenoble.fr,Groupe hospitalier mutualiste de Grenoble,healthcare
-glasgow-ky.com,Glasgow EPB,ISP
-glesys.net,GleSYS,Web Host
-glink.inf.br,Glink,Web Host
-gln.net.br,Global Lines,ISP
-globalit.com,Global IT,MSP
-gmoserver.jp,GMO,Web Host
-gmu.edu,George Mason University,Education
-gmx.com,GMX,ISP
-gmx.net,GMX,ISP
-godaddy.com,GoDaddy,Web Host
-goldmedimport.com.br,Goldmed import,Healthcare
-gom.co.za,Graytown Office Machines,MSP
-google.com,Google (Including Gmail and Google Workspace),Email Provider
-googleusercontent.com,Google Cloud Platform (GCP),PaaS
-gosecure.net,GoSecure,Email Security
-goskope.com,Netskope,Email Security
-gov.in,Indian government,Government
-gpphosted.com,Proofpoint (Government),Email Security
-grainger.ca,Grainger Industrial Supply,Industrial
-grainger.com,Grainger Industrial Supply,Industrial
-graysmark.net,Graysmark Business Systems,MSP
-greenarrowmail.com,GreenArrow,SaaS
-greenconsulting.it,Green Consulting,MSP
-grupocybernet.com.br,Grupo Cybernet,ISP
-gruposalinas.com.mx,Groupo Salinas,Conglomerate
-gsbridge.com,Golden State Bridge,Industrial
-gtnexus.com,Infor Nexus (Formerly GT Nexus),SaaS
-gts.sk,GTS Slovakia,ISP
-guardedhost.com,Omnis Network,Web Host
-gunma-u.ac.jp,Gunma University,Education
-gva.es,Generalitat Valenciana,Government
-gwu.edu,The George Washington University,Education
-h-isac.org,H-ISAC,Healthcare
-hammacher.com,Hammacher Schlemmer,Retail
-han-solo.net,hostNET,Web Host
-hanami.run,Mailwip (Formerly Hanami),Email Provider
-hanastar.net.id,HSnet,ISP
-hap.be,CHU Ambroise Paré,Healthcare
-harrishealth.org,Harris Health System,Healthcare
-harvard.edu,Harvard University,Education
-hathway.com,Hatchway,ISP
-hctc.net,Hill County Telephone Cooperative (HXTC),ISP
-hdems.com,HENNGE Mail Archive,SaaS
-hdsupply-email.com,HD Supply,Retail
-healthall.com,UC Health,Healthcare
-healthcaresupplypros.com,Healthcare Supply Pros,Healthcare
-healthproductsforyou.com,Health Products For You,Healthcare
-helloserver6.com,1st Source Web,Marketing
-helpforcb.com,InterServer,Web Host
-helpscout.net,Help Scout,SaaS
-herbion.com,Herbion,Healthcare
-heteml.jp,GMO,Web Host
-hey.com,HEY,Email Provider
-heywoodhill.com,Heywood Hill,Retail
-hhsys.org,Huntsville Hospital,Healthcare
-hickorytech.net,Consolidated Communications,ISP
-highmark.com,Highmark,Healthcare
-highradiuscorp.com,HighRadius,Finance
-highspot.com,Highspot,Marketing
-highwire.org,HighWire,SaaS
-hinet.net,HiNet,ISP
-hiwaay.net,HuWAAY,ISP
-hiworks.co.kr,hiworks,SaaS
-hmcaguas.com,Puerto Rico Telephone Company,ISP
-hoaspace.com,HOA Space,SaaS
-hokudai.ac.jp,Hokkaido University,Education
-hol.gr,Vodafone,ISP
-homesteadhealthcareservices.com,Homestead Health Care Services,Healthcare
-hornetsecurity.com,Hornetsecurity,MSSP
-hosp.kaizuka.osaka.jp,Kaizuka City Hospital,Healthcare
-hostatom.com,hostatom,Web Host
-hosted-by-robovps.ru,RoboVPS,Web Host
-hostedemail.com,HostedEmail.com,Email Provider
-hostek.com,HOSTEK,Web Host
-hosteurope.de,Host Europe,Web Host
-hostglobal.plus,HOSTGLOBAL.PLUS,Web Host
-hostguy.com,hosting.india.to,Web Host
-hostico.ro,HOSTICO,Web Host
-hosting-mexico.net,Hosting-Mexico,Web Host
-hosting-universal.com,Hosting Universal,Web Host
-hosting.ie,Irish Domains Limited,Web Host
-hostinger.io,Hostinger,Web Host
-hostlife.net,HOSTLIFE,Web Host
-hostmonster.com,Hostmonster,Web Host
-hostnet.nl,Hostnet,Web Host
-hostneverdie.com,Hostneverdie,Web Host
-hostpacific.com,HostPacific.com,Web Host
-hostpapavps.net,HostPapa,Web Host
-hostpoint.ch,Hostpoint,Web Host
-hostresolver.net,Stack Harbor,Web Host
-hosts.co.uk,Namesco Limited,Web Host
-hostsecure.us.com,WordPress US Hosting,Web Host
-hostsevenplus.com,HostSevenPlus,Web Host
-hostspeedy.com,Host Speedy,Web Host
-hostwindsdns.com,Hostwinds,Web Host
-hotnet.net.il,Hot Net Internet Services,ISP
-hringdu.is,Hringdu,ISP
-hspherefilter.com,"DynamicNet, Inc. (DNI)",Web Host
-htc.net,HTC,ISP
-htmlservices.it,HTMLServices.it,MSP
-hubspotemail.net,HubSpot,Marketing
-hugel-inc.com,Hugel,Healthcare
-hughes.net,Hughes Network Systems,ISP
-hughston.com,Hughston Clinic,Healthcare
-hvvc.us,Hivelocity,Web Host
-i2ts.ne.jp,i2ts,Web Host
-i4i.com,i4i,Technology
-ice.co.cr,Grupo ICE,Industrial
-icehosting.nl,IceHosting,Web Host
-icewarpcloud.in,IceWrap,Email Provider
-icoremail.net,Coremail,Email Provider
-ideaservers.net,Hetzner,Web Host
-identibitsuisse.ch,identibit suisse,Marketing
-idig.net,Canadian Web Hosting,Web Host
-idodns.com,IDO DNS,MSP
-ifeelfree.co.nz,I Feel Free,MSP
-iftnet.com.br,IFTNET Telecom,ISP
-iglou.com,IgLou Internet Services,ISP
-iij4u.or.jp,Internet Initiative Japan,ISP
-ik2.com,Spamflare,Email Security
-ilap.com,ILAP,ISP
-imanila.ph,iManila,Marketing
-imcconseil.fr,IMC Conseil,MSP
-improvmx.com,ImprovMX,Email Provider
-impulsahosting.com,Impulsa IT Solutions,Web Host
-ims.net.co,IMS,ISP
-imsbiz.com,Hong Kong Telecommunications (HKT),ISP
-incontact.com,NICE CX,SaaS
-indemed.com,Cardinal Health at-home (Formerly Independence Medical),Healthcare
-indytel.com,Independence Light & Power Telecommunications,ISP
-ineedbob.com,Computer Solutions,MSP
-inet.vn,INET,Web Host
-infinivan.com,InfiniVAN,ISP
-infolink.ru,Infolink,ISP
-infomaniak.ch,infomaniak,Web Host
-infor.com,Infor,SaaS
-inforcloudsuite.com,Infor,SaaS
-inkyphishfence.com,INKY,Email Security
-inmotionhosting.com,InMotion Hosting,Web Host
-innline.net,innline,SaaS
-innovasur.com,Innovasur,MSP
-inovalon.com,inovalon,Healthcare
-inspiren.my,Inspiren,Marketing
-instantprint.com,Instant Print Corp,Print
-integra.net.au,integra,MSP
-intellisurvey.com,InteliSurvey,SaaS
-inter.net.th,Internet Thailand Company Limited,ISP
-interhost.it,Genesys Informatica Srl,MSP
-intermetalsa.co.mz,Intermetal,Construction
-internet-webhosting.com,iWHOST,Web Host
-internetmailserver.net,Internet Mail Server Networks,Email Provider
-investinmiddlesex.ca,"Middlesex County, Canada",Government
-inxserver.de,Inxmail,Marketing
-ionblade.com,IonBLADE,Web Host
-ip-15-235-216.net,OVH,Web Host
-ip-5-196-151.eu,OVH,Web Host
-ip-51-195-53.eu,OVH,Web Host
-ip-51-254-53.eu,OVH,Web Host
-ip-51-77-42.eu,OVH,Web Host
-ip-51-83-140.eu,OVH,Web Host
-ip-51-89-240.eu,OVH,Web Host
-ip-87-98-138.eu,OVH,Web Host
-ip-92-204-129.us,OVH,Web Host
-iphmx.com,Cisco Cloud Email Security (CES),Email Security
-iphotel.net.br,IPHOTEL Hosped,Web Host
-iphouse.net,Sandwich,Web Host
-ipost.com,iPost,Marketing
-iqcomputing.net,IQComputing,Web Host
-iqhive.com,IQ Hive,MSP
-ironwoodcrc.com,Ironwood Cancer & Research Centers,Healthcare
-is74.ru,Intersvyaz,ISP
-ispgateway.de,domainfactory GmbH,Web Host
-isplevel.pro,ISPLevel,Web Host
-ispn.net,ISPN,MSP
-ispnet.us,ISPnet.us,Web Host
-ispserver.com,ISPServer,Web Host
-issp.at,issp,Web Host
-issr.ru,Mobile TeleSystems,ISP
-istitutotumori.mi.it,Istituto Nazionale dei Tumori,Healthcare
-isync.io,iSync.io,SaaS
-italiaonline.it,Italiaonline,Web Host
-iti-e.co.jp,ITI,Healthcare
-itmedia.co.jp,ITmedia,News
-itscom.net,iTSCOM,ISP
-iuhw.ac.jp,International University of Health and Welfare,Education
-iwashiya-nagai.co.jp,Iwashiya Nagai Co,Healthcare
-jabatus.fr,o2switch,Web Host
-jadecom.or.jp,Japan Association for Development of Community Medicine,Healthcare
-jamescitycountyva.gov,"James City County, Virginia",Government
-javvara.com,javvara,Marketing
-jccm.es,Junta de Comunidades de Castilla-La Mancha,Government
-jellyfish.systems,Namecheap,Email Security
-jikei.ac.jp,The Jikei University,Education
-jinr.ru,Joint Institute for Nuclear Research,Science
-jma-c.jp,Japan Medical Alliance Corporation,Healthcare
-johnshopkins.edu,Johns Hopkins University,Education
-joker-forward.com,Joker.com,Email Provider
-justwebtelecom.com.br,JustWeb,ISP
-jweiland12.net,domainfactory GmbH,Web Host
-jwtech.co.th,JW TECH,Industrial
-kagoya.net,KAGOYA,Web Host
-kalittacharters.com,Kalitta Charters,Logistics
-kanazawa-u.ac.jp,Kanazawa University,Education
-kansas.net,KansasNwt,MSP
-kaspr-privacy.io,Kaspr,Marketing
-kcell.kz,Kcell,ISP
-kchnet.or.jp,Kurashiki Central Hospital (KCH),Healthcare
-kcn.ne.jp,KCN,ISP
-kcom.com,KCOM,ISP
-kddi.ne.jp,KIDDI,ISP
-keio.ac.jp,Keio University,Education
-keio.jp,Keio University,Education
-kendall.cz,GPS Praha,Healthcare
-kennesawtrans.com,Kennesaw Transportation,Logistics
-keralavisionisp.com,Keralavision Broadband,ISP
-keycorpgroup.com,KeyCorp Financial,Finance
-keymail.com,KeyMail,Email Provider
-kforce.com,Kforce,Staffing
-kilmarnock.ca,Kilmarnock Enterprise,Industrial
-kindlebio.com,Kindle Bioscinces,Healthcare
-king-good.com,Jinku Group,Industrial
-kingswoodfacadesthailand.com,Kingswood Facades Thailand,Industrial
-kirkbrothers.com,Kirk Brothers Supercenter,Automotive
-kitano-hp.or.jp,Kitano Hospital,Healthcare
-klinik-arlesheim.ch,Klinik Aresheim,Healthcare
-kmtn.ru,Kostrom City Telephone Network,ISP
-kmu.ac.jp,Kansai Medical University,Education
-knet.kg,Kyrgyztelecom,ISP
-kobe-u.ac.jp,Kobe University,Education
-kodiaksys.com,ARIOS,SaaS
-konicaminolta.us,Konica Minolta,Technology
-koumbit.net,Koumbit.org,MSP
-kovacmed.com,KOVAC-MED,Healthcare
-kpn.net,KPN,ISP
-kpu-m.ac.jp,Kyoto Prefectural University of Medicine,Education
-kreativemachinez.tech,Kreative Machinez,Marketing
-kryptronic.com,Kryptronic,SaaS
-ktc.kz,KTC Kazakhstan LLP,Industrial
-ktis.net,Kingdom Networks,ISP
-ktk-sol.co.jp,KtK Solutions,Email Security
-kundenserver.de,domainfactory GmbH,Web Host
-kyoto-u.ac.jp,Kyoto University,Education
-l3harris.com,L3Harris,Defense
-laboratoires-thea.fr,Laboratoires Théa,Healthcare
-larkinhospital.com,Larkin Health System,Healthcare
-larrycomputerguy.com,Larry The Computer Guy,MSP
-lauruslabs.com,Lasarus Labs,Healthcare
-lawtendo.com,Lawtendo,Legal
-lb.go.gov.br,Government of Goias State Brasil,Government
-lcmh.com,Lake Charles Memorial Health System,Healthcare
-learningstream.com,Learning Stream,SaaS
-leftor.ba,Leftor,Web Host
-legenditsolutions.com,Legend IT Solutions,Web Host
-lestetelecom.com.br,Leste,ISP
-lghealth.org,Penn Medicine Lancaster General Health,Healthcare
-liberation.fr,Liberation,News
-ligataxi.com,LiguaTaxi,SaaS
-ligmais.com.br,Lig+Telecom,ISP
-liguriadigitale.it,Liguria Digitale,MSP
-likuid.com,Likuid,Web Host
-lindsaymunicipalhospital.com,Lindsay Municipal Hospital,Healthcare
-linejet.net.br,LineJet,ISP
-link3.net,Link3 Technologies,ISP
-linkedin.com,LinkedIn,Social Media
-linode.com,Linode,Web Host
-linqtelecom.com.br,LinQ Telecom,ISP
-liquidtelecom.net,Liquid Intelligent Technologies,ISP
-live-servers.net,Fasthosts Internet Ltd,Web Host
-livedo.jp,Livedo Corporation,Healthcare
-livemail.co.uk,Fasthosts Internet Ltd,Web Host
-livenation.com,Live Nation,Entertainment
-llumc.edu,Loma Linda University Medical Center,Healthcare
-lmi.net,LMi.net,ISP
-locaweb.com.br,Locaweb,Web Host
-lodestonegroup.com,Loadstone Insurance,Insurance
-loftsinc.com,"Lofts, Inc.",Retail
-logisticintegrators.com,Logistics Integrators,Logistics
-logix.in,Logix InfoSecurity,MSP
-lolipop.jp,Lolipop,Web Host
-loopia.se,Loopia,Web Host
-lowesthosting.com,Lowest Hosting,Web Host
-lpn.co.th,L.P.N. Development PCL,Real Estate
-lstn.net,Limestone Networks,Web Host
-lubonet.net.pl,LUBONET,ISP
-luxsci.com,LuxSci,Email Security
-lxcluster.at,LXCluster,Web Host
-lytehosting.com,Lyte Hosting,Web Host
-m9network.com,Volico Data Centers,Web Host
-macrx.com,MAC Rx,Healthcare
-maersk.com,Maersk,Logistics
-maestroit.com,Maestro IT Services,MSP
-magnoliarental.com,Magnolia Rental,Retail
-mail.com,Mail.com,Email Provider
-mail.mil,Mail.mil,Government
-mail.ru,Mail.ru,Email Provider
-mail2world.com,Mail2World,Email Provider
-mailbaby.net,Mail Baby,Email Security
-mailchannels.net,MailChannels,Web Host
-mailcloud.com.tw,MailCloud,Email Provider
-mailcontrol.com,Forcepoint,Email Security
-mailgun.info,Mailgun,SaaS
-mailgun.net,Mailgun,SaaS
-mailgun.us,Mailgun,SaaS
-mailhop.org,DuoCircle,Email Security
-mailhostbox.com,Unified Layer,Web Host
-mailin.fr,Sendinblue,SaaS
-mailinblack.com,Mailinblack,Email Security
-mailjet.com,Mailjet,Marketing
-mailmerc.com,MAILNERC,Email Security
-mailnara.co.kr,Mailnara,Web Host
-mailplug.co.kr,Mailplug,Email Provider
-mailplug.com,Mailplug,Email Provider
-mailprotect.be,Combell,Web Host
-mailroute.net,MailRoute,Email Security
-mailsecure.jp,NTTPC Communications,Email Security
-mailspamprotection.com,SiteGround,Web Host
-mailwip.com,Mailwip,Email Provider
-majorcore.com,MajorCore,Web Host
-makeshop.jp,makeshop,SaaS
-maletazul.pt,Maletazul,MSP
-mamacheaps.com,Mama Cheaps,Retail
-managedns.org,IBM Cloud,IaaS
-mandrillapp.com,Mailchimp Transactional,SaaS
-mappsoluciones.com,MappS Soluciones,Web Host
-mark-itt.net,Point Internet,ISP
-mark-net.co.jp,Mark Co,Marketing
-marriott-service.com,Marriott,Travel
-mars-inc.com,Mars,Food
-maruyamakai.or.jp,Maruyamakai,Healthcare
-masterhost.ru,Master Host,Web Host
-mastertrg.ru,МастерМебель,Retail
-materprivate.ie,Mater Private Network,Healthcare
-matrixglobal.net.id,Matrixnet,ISP
-maxaninteirorsystems.com,Maxan Interior Systems,Industrial
-maximtech.com,Maximtech,Web Host
-maximweb.com,Maxim Management Services,Healthcare
-maxnet.ua,Maxnet,ISP
-mccooknet.com,McCookNet,Web Host
-mcdlv.net,Intuit Mailchimp,Marketing
-mcdougallauction.com,McDougall Auctioneers,Industrial
-mchsi.com,MediacomCable,ISP
-mcmaster.com,McMaster-Crr,Manufacturing
-mcsv.net,Intuit Mailchimp,Marketing
-mdcc.gob.pe,Municipalidad Distrital de Cerro Colorado,Government
-mdlsx.ca,"Middlesex County, Canada",Government
-me.com,Apple iCloud,Email Provider
-medi-take.jp,Medi-Take,Healthcare
-media3.us,Media3,MSP
-mediaticanet.it,Mediatica,Web Host
-medimpact.com,MedImpact,Healthcare
-meditake.jp,Medi-Take,Healthcare
-medline.com,Medline,Healthcare
-mega.kg,Maga-Line,ISP
-megacom.kg,MegaCom,ISP
-megalink.net.ru,Мегалинк,ISP
-megamailservers.com,MegaMailServers,MSP
-menlosecurity.com,Menlo Security,Email Security
-mercranet.com,Mercranet,Web Host
-mercurygate.net,MercuryGate,SaaS
-meric.net.tr,Meriç Hosting,Web Host
-merula.net,Merula,ISP
-messagelabs.com,Symantec Email Security,Email Security
-messagingengine.com,Fastmail,Email Provider
-mesvr.com,ReadNotify,Email Provider
-metfone.com.kh,Metfone,ISP
-metricsthatmatter.com,Metrics That Matter,SaaS
-metrocomm.com,Metro Communications,ISP
-metronetinc.net,Metronet,ISP
-mgsm.ru,Aviasales,Travel
-mho.de,Marienhospital Osnabrück,Healthcare
-mhos.de,Marienhospital Osnabrück,Healthcare
-mia.net,HostDrive,Web Host
-miamioh.edu,Miami University,Education
-microfocus-japan.com,Micro Focus,MSP
-microsoft.com,Microsoft,Technology
-middlesex.ca,"Middlesex County, Canada",Government
-midi-loisirs.com,Midi Loisirs,Entertainment
-migadu.com,Migadu,Email Provider
-milkcratesdirect.com,FARMPLAST,Retail
-milleni.com.tr,Millenicom,ISP
-mimecast.com,Mimecast,Email Security
-minigraphics.net,Mini Graphics,Print
-mirohost.net,MiroHost,Web Host
-mistral.co.uk,Nasstar,MSP
-mistral.net,Nasstar,MSP
-mit.edu,MIT,Education
-mivamerchant.net,Mirva,SaaS
-mknetwork.com.br,MkK Network Telecom,ISP
-mktdns.com,Marketo,Marketing
-mktomail.com,Marketo,Marketing
-mlec.com,Meriwether Lewis Electric Cooperative,ISP
-mlems.ca,Middlesex-London Paramedic Service,Healthcare
-mlps.ca,Middlesex-London Paramedic Service,Healthcare
-mmm.com,3M,Technology
-mmrs.jp,Mirai Communication Network Inc.,Web Host
-mni.net,MNI,Marketing
-mobilecountypublicworks.net,Mobile County Public Works,Government
-modeldrug.com,Model Health Care,Healthcare
-modenesegastone.com,Modenese Gastone,Retail
-mojohost.com,MojoHost,Web Host
-molalla.net,Molalla Communications,ISP
-monatglobal.com,MONAT Global,Beauty
-moniker.com,Moniker,Web Host
-moovik.com.ua,MooVik,Retail
-morganstanleysmithbarney.com,Morgan Stanley Smith Barney,Finance
-mostobene.com,Mostobene,Healthcare
-mounet.com,MouNet,ISP
-movitel.co.mz,Movitel,ISP
-mrhost.biz,MrHost,Web Host
-mserwis.pl,MSERWIS,Web Host
-msgexch.com,Constant Contact,Marketing
-mtaroutes.com,N-able,Email Security
-mtasv.net,Postmark,SaaS
-mtdtraining.co.uk,MTD Training Group,SaaS
-mtnl.net.in,MTNL,ISP
-mts.ru,MTS,ISP
-mtsnet.ru,Mobile TeleSystems PJSC (MTS),ISP
-mtsvc.net,GoDaddy,Web Host
-mtu-net.ru,Mobile TeleSystems,ISP
-mundivox.com,Mundivox Communications,ISP
-musashi-eng.co.jp,Musashi Engineering,Manufacturing
-mwprem.net,NTT,ISP
-mx.net,Silversky,Email Security
-mxncommerce.com,MXN Commerce Group,SaaS
-mxrecord.io,Area 1 Email Security,Email Security
-mxrecord.mx,Area 1 Email Security,Email Security
-mxroute.com,MXroute,Email Provider
-mxs.au,Synergy Wholesale,Web Host
-my-tss.com,Performive,MSP
-myaccess.ca,Access Communications,ISP
-mydsomanager.com,My DSO Manager,SaaS
-myfairpoint.net,Consolidated Communications,ISP
-myfleetvehicle.com,ATS Processing Services,Finance
-mygoto.com,MyGoto Brands,Web Host
-myhosting.com,MyHosting,Web Host
-mylinkline.com,MyLinkLine,SaaS
-mymailcheap.com,Mailcheap,Email Provider
-mymailhosting.com,Doteasy,Web Host
-mymanga.co.ke,Mymanga Networks,ISP
-mymts.net,Bell MTS,ISP
-myregisteredsite.com,web.com,Web Host
-mysecurecloudhost.com,World Host Group,Web Host
-mysecuritas.com,Securitas,Physical Security
-mywhc.ca,Web Hosting Canada,Web Host
-myworkday.com,Workday,SaaS
-nagoya-cu.ac.jp,Nagoya City University,Education
-nagoya-u.ac.jp,Nagoya University,Education
-nahealth.com,Northern Arizona Healthcare,Healthcare
-name.com,Name.com,Web Host
-nameserver.sk,Webglobe,Web Host
-namespro.ca,Namespro,Web Host
-nano.uz,Nano Telecom,ISP
-nascoeducation.com,Nasco EDucation,Education
-nationalhha.com,National Home Health,Healthcare
-navayuga.com,Navayuga,Industrial
-naviexp.jp,NaviExp,MSP
-nbcb.cn,Bank of Ningbo,Finance
-nctc.com,NCTC,ISP
-nearlyfreespeech.net,NearlyFreeSpeach.NET,Web Host
-needles.co.kr,Tae Chang Industrial,Healthcare
-neoclan.net.mx,Neoclan Networks,ISP
-nephronpharm.com,Nephon,Healthcare
-net-uno.net,Net Uno,ISP
-netage.jp,NETAGE,ISP
-netcabo.pt,NOS,ISP
-netcore.co.in,Netcore,Marketing
-netdesignhost.com,Netdesign Group,Web Host
-netfinn.net,netFinn,Web Host
-nethosting.com,NetHosting,Web Host
-netmds.com,Net Doctors,MSP
-netpagedns.net,Netpage Internet Services,ISP
-netrevolution.com,NetRevolution,ISP
-netroad.ru,Mobile TeleSystems,ISP
-netsolus.com,netsolus KC,MSP
-netsville.com,Netsville,Marketing
-netsystemtelecom.net.br,NetSystem FibraTelecom,ISP
-nettlinx.com,Nelinx,ISP
-nettoday.co.th,Net Today,Web Host
-netventure.pl,Netventure,MSP
-netvigator.com,HKT,ISP
-network80.com,Network80,Web Host
-neuca.pl,NECUA Group,Healthcare
-new-life.com,New Life,Retail
-newpages.com.my,NEWPAGES,Retail
-newsmanapp.com,NewsMAN,Marketing
-newsunseo.com,NewSunSEO,Marketing
-newtekwebhosting.com,Newtek Technology Solutions,Web Host
-nexcess.net,Nexcess,Web Host
-nexicom.net,Nexicom,ISP
-next-gen.ro,NextGen,ISP
-ngpweb.com,Bonterra,Marketing
-nhisac.org,H-ISAC,Healthcare
-nhs.net,NHSmail,MSP
-nicmail.ru,RU-CENTER,Email Provider
-nifty.com,@nifty,Web Host
-niigata-u.ac.jp,Niigata University,Education
-nititancommercial.com,Niti Tan Commercial,Industrial
-nocdirect.com,JaguarPC,Web Host
-nolegia.net,Nolegia,Web Host
-nordnet.fr,Nordnet,ISP
-nordstrom.com,Nordstrom,Retail
-northwestern.edu,Northwestern University,Education
-nos.pt,NOS,ISP
-novotelecom.ru,Novo Telcom,ISP
-noxlink.com.br,NoxLink,ISP
-npcma.ru,Nizhnekamsk Enterprise,Industrial
-nrtmexico.mx,Corporativo Núcleo Radio Televisión,News
-nsmailserv.com,Netcore,Marketing
-ntirety.com,Ntirety,MSP
-ntt.com,NTT Communications,ISP
-nttdocomo.co.jp,NTT DOCMO,ISP
-nuveramail.net,Nuvera,Email Provider
-nw027.com,Poppulo (Formerly Newsweaver),SaaS
-nxcli.net,Liquid Web,Web Host
-nycm.com,NYCM Insurance,Finance
-o-mx.com,Omedia,Marketing
-o2.cz,O2,ISP
-obird.ca,obid.ca,MSP
-obit.kz,OBIT,ISP
-oboi1.ru,Oboi no1,Retail
-occtoplus.com.br,Occtoplus,SaaS
-oceanviewfunding.com,Ocean View Funding,Finance
-ocn.ad.jp,NTT,ISP
-ocn.ne.jp,OCN,ISP
-octacom.ca,Octacom,MSP
-odoo.com,Odoo,SaaS
-odu.edu,Ohio Dominican University,Education
-ohio.edu,Ohio University,Education
-okanagan.net,Okanagan.net,Web Host
-okayama-u.ac.jp,Okayama University,Education
-okta.com,Okta,SaaS
-oleane.fr,Oleane,ISP
-omeda.com,Omedia,Marketing
-omninet.co.nz,OmniNet,ISP
-omnis.com,Omnis,Web Host
-onamae.ne.jp,GMO Internet,Web Host
-ondal.com,Ondal Medical Systems,Healthcare
-one-email.co.th,One Email,Email Provider
-one-mail.on.ca,eHealth Ontario,Healthcare
-one.com,One.com,Web Host
-one.th,One Platform,Email Provider
-onec1.com,C1,MSP
-onecallnow.com,One Call Now,SaaS
-onedaysign.com,One Day Signs,Retail
-oneoffice.jp,OneOffice,SaaS
-onice.io,IceWrap,Email Provider
-online.kz,Kazakhtelecom,ISP
-online.net,Scaleway,Email Provider
-online.tj.cn,China Unicom,ISP
-ono.com,Vodafone Ono,ISP
-ontarioshores.ca,Ontario Shores Centre for Mental Health,Healthcare
-ontash.com,Ontash & Ermac,Industrial
-onvif.org,Onvif,Technology
-ooma.com,Ooma,ISP
-openair.com,Oracle NetSuite OpenAir,SaaS
-opentext.com,OpenText,SaaS
-openwave.ai,Openwave Messaging,Email Provider
-optimus.si,Optimus IT d.o.o.,MSP
-optipub.com,OptiPub,Publishing
-optonline.net,Optimum,ISP
-orange-business.com,Orange Business,ISP
-orange.es,Orange,ISP
-orange.fr,Orange,Email Provider
-orange.net.il,Orange,ISP
-orangecustomers.net,Orange,ISP
-orbital.net,Orbital Net,ISP
-oregonstate.edu,Oregon State University,Education
-ori.net,ORI,ISP
-orionnet.ru,Orion Telecom,ISP
-orthodoxws.com,Orthodox Web Solutions,Web Host
-oser.com,Oser Comunications Group,Marketing
-osir.net.br,Osirnet,ISP
-osu.edu,The Ohio State University,Education
-otelco.net,GoNetSpeed,ISP
-otenet.gr,Cosmote,ISP
-ottcmail.com,Ontario & Trumansburg Telephone Companies,ISP
-outboundrelay.com,ForwardMX,SaaS
-outlook.cn,Outlook (China),Email Provider
-outlook.com,Outlook (Personal and Microsoft 365),Email Provider
-ovh.ca,OVH,Web Host
-ovh.net,OVH,Web Host
-ovh.us,OVH,Web Host
-ownit.se,Ownit,ISP
-owt.com,One World Telecommunications,ISP
-ox.ac.uk,Education of Oxford,Education
-oxsus-vadesecure.net,Scaleway,Web Host
-pair.com,Pair Networks,Web Host
-pairdomains.net,Pair Domains,Web Host
-pairvps.com,Pair Networks,Web Host
-paket78.ru,Пакет Пакетов,Industrial
-palette-up.jp,Palette UP,Web Host
-panelvps.net,PanelBox,Web Host
-panola.com,Complete Computers,MSP
-paragould.net,Paragould Municipal Utilities,ISP
-parkerinstitute.org,Parker Jewish Institute for Healthcare & Rehabilitation,Healthcare
-parsleysage.net,.ParsleySage Guest House,Travel
-paubox.com,Paubox,Email Security
-pbiaas.com,INOS,Web Host
-pd25.com,Salesforce Marketing Cloud (Formerly Pardot),Marketing
-peaknet.net,PeakNet,Industrial
-pearcebevill.com,"Pearce, Bevill, Leesburg, Moore, P.C.",Finance
-peopleanswers.com,Infor,SaaS
-pepitrans01.com,Netcore (Formerly Pepipost),SaaS
-pepitrans02.com,Netcore (Formerly Pepipost),SaaS
-perception-point.io,Perception Point,Email Security
-perenso.com,Perenso,Marketing
-perfora.net,IONOS,Web Host
-perimeterwatch.com,PerimeterWatch,MSSP
-petroed.com,PetroEd,Education
-pfmsys.com,Professional Flight Management (PFM),Logistics
-pgcps.org,Prince George's County Public Schools,Education
-piedmonteye.com,Piedmont Eye Center,Healthcare
-pif.co.uk,Pinnacle Freight,Logistics
-pipefy.com,Pipefy Inc,SaaS
-plala.or.jp,Plala,ISP
-planety.com.br,Planety Internet,ISP
-platform.sh,Platform.sh,PaaS
-play-internet.pl,Play,ISP
-playbackmail.com,PlayBackMail,Email Provider
-pldi.net,Pioneer Cellular,ISP
-pldt.net,PLDT,ISP
-plis.net.br,Plis Telecom,ISP
-plus.net,plusnet,ISP
-plus.pl,Plus,ISP
-pmweb.com.br,pmweb,Marketing
-pobox.com,Pobox,Email Provider
-pol-online.com,Bangladesh Online,ISP
-pol.ir,ParsOnline,ISP
-poneytelecom.eu,Pony Telecom,Web Host
-porkbun.com,porkbun.com,ISP
-portative.net,Portative Technologies,ISP
-ppe-hosted.com,Proofpoint Essentials,Email Security
-pphosted.com,Proofpoint,Email Security
-prchost.com,PRC Hosting,Web Host
-prempub.com,Premier Publishing,Marketing
-princeton.edu,Princeton University,Education
-principal-it.com,Principal IT,MSP
-privateemail.com,PrivateEmail.com,Email Provider
-privatelabeldns.com,TurnKey Internet,Web Host
-privatelayer.com,Private Layer,Web Host
-privatesystems.net,PrivateSystems.net,Web Host
-prnewswire.com,PR Newswire,Marketing
-procopa.dk,Procopa IT,MSP
-profitserver.ru,Profitserver,Web Host
-prontomarketing.com,Pronto Marketing,Marketing
-proofhubmail.com,ProofHub,SaaS
-prosites.com,ProSites,Web Host
-proton.ch,Proton,Email Provider
-proton.me,Proton,Email Provider
-protonmail.ch,Proton,Email Provider
-provedornetcenter.com.br,Netcenter,ISP
-proventainternational.com,Proventa International,Healthcare
-prudential.com.sg,Prudential Singapore,Finance
-prudentpublishing.com,Prudent Publishing,Retail
-prw.net,Puerto Rico Webmasters,Web Host
-pserver.space,Profitserver,Web Host
-psychz.net,Psychz Networks,Web Host
-ptd.net,PTD,ISP
-ptrcloud.net,GMO GlobalSign,IaaS
-pubnix.net,PubNIX,Web Host
-puc-rio.br,PUC Rio,Education
-pucminas.br,PUC Minas,Education
-pucp.edu.pe,Pontificia Universidad Católica del Perú,Education
-pulkco.com,Pulk & Co,ISP
-pulsetv.com,Pulse TV,Retail
-purdue.edu,Purdue University,Education
-pwuhui.com.tw,Perfect Medical,Healthcare
-qemailserver.com,Qualtrics,SaaS
-qlix.com.br,Qlix,Web Host
-qq.com,QQ,Email Provider
-qrc.ca,Quality Respiratory Care,Healthcare
-qth.com,QTH.com,Web Host
-quadax.com,Quadax,Healthcare
-quadranet.com,Quadranet,Web Host
-questforum.org,Telecommunications Industry Association,Industrial
-quitmancountyms.org,"Quitman County, Mississippi",Government
-quotevalet.com,QuoteValet,SaaS
-qvidian.com,Qvidian,SaaS
-qwest.net,Quest Communications,ISP
-r3zo.net,R3ZO,Web Host
-rack400.com,Rack400,Web Host
-racknation.cr,RsckNation,Web Host
-rackspace.com,Rackspace,Web Host
-radarinternet.com.br,Radar Internet,ISP
-radiantsolutions.net,Radient Solutions,Web Host
-rafftechnologies.com,Raff Technologies,Web Host
-raiolanetworks.com,Raiola Networks,Web Host
-raleighortho.com,Raleigh Orthopaedic,Healthcare
-ramsaysante.fr,Ramsay Santé,Healthcare
-raycdjr.com,Ray Chrysler Dodge Jeep RAM,Automotive
-rcil.gov.in,RailTel,ISP
-rcn.com,RCN,ISP
-rdp.sh,RDP.sh,SaaS
-redbird.net,NexGenAccess (Formerly Redbird),ISP
-redcotel.bo,Cotel Ltda.,ISP
-redesiminternet.com.br,Sim Fibra,ISP
-redetuxnet.com.br,Tuxnet,ISP
-redexpertos.com,RedExpertos,Web Host
-rediffmailpro.com,Rediffmail Pro,Email Provider
-redirection.net,Redirectionet,Web Host
-reef-guardian.com,Reef Guardian,Education
-reg.ru,Reg.ru,Web Host
-reg365.net,register365,Web Host
-regentbranding.co.uk,Regent Branding,Marketing
-regiomed-kliniken.de,REGIOMED-KLINIKEN GmbH,Healthcare
-register.it,Register.it,Web Host
-registeredsite.com,Web.com,Web Host
-registrar-servers.com,Namecheap,Web Host
-regusnet.com,Regus,Real estate
-regxa.com,Regxa Cloud,Web Host
-relativity.one,RelativityOne,SaaS
-relod.ru,RELOD,Retail
-rheamedical.org,Rhea Medical Center,ISP
-rhein-it.de,RHEN IT,MSP
-riberasaludmail.com,Ribera Salud,Healthcare
-rightnowtech.com,Oracle Service Cloud,SaaS
-rima-tde.net,"TELEFONICA, S.A.",ISP
-riskonnectclearsight.com,Riskonnect ClearSight,SaaS
-rit.edu,Rochester Institute of Technology,Education
-ritternet.com,Ritter Communications,ISP
-rmx.de,Retarus GmbH,SaaS
-roche.com,Roche,Healthcare
-rogers.com,Rogers,ISP
-rootlayer.net,RootLayer LTD.,Web Host
-rotundasoftware.com,Rotunda Software,MSP
-rsa.com,RSA,Technology
-rsgsv.net,Intuit Mailchimp,Marketing
-rt.ru,RT,Government Media
-runbox.com,Runbox,Email Provider
-rusonyx.ru,Rysonyx Cloud,Web Host
-rutgers.edu,Rutgers University,Education
-rwas.co.uk,Royal Welsh Agricultural Society,Agriculture
-rzone.de,Strato AG,Web Host
-sabyrconsulting.com,Sabyr Consulting,MSP
-safari-productions.com,Safari Productions,Event Planning
-safaricombusiness.co.ke,Safaricom,ISP
-safewebservices.com,NMI,SaaS
-saimanet.kg,Saima Telecom,ISP
-sakura.ne.jp,SAKURA Internet,ISP
-salesforce.com,Salesforce,SaaS
-samanage.com,SolarWinds Service Desk,SaaS
-samil-pharm.com,Samil,Healthcare
-samtel.ru,Samtelecom,ISP
-sandrix.com,Sandrix Technologies,MSP
-santehealth.net,Sante Health System,Healthcare
-saplbd.com,Summit Alliance Port,Logistics
-sapmed.ac.jp,Sapporo Medical University,Healthcare
-sarkor.uz,Sarkor,ISP
-sbcglobal.net,AT&T,ISP
-scaledsystems.com,SimpleNet,Web Host
-scatair.com,Scatair,Manufacturing
-schmc.ac.kr,Soon Chun Hyang University Medical Center,Healthcare
-scorm.com,SCORM,SaaS
-sdldelivery.com,Specialty Delivery & Logistics,Logistics
-sealbond.co.jp,Nippon Sealbond,Manufacturing
-seaspraymta1.com,Cox Communications,ISP
-seaspraymta2.com,Cox Communications,ISP
-secomtrust.net,SECOM Trust Systems,MSP
-sectormail.net,Sectorlink,Web Host
-secure-mailgate.com,Secure Mailgate,Email Provider
-secure-mails.com,Tata Communications,SaaS
-secure.jp,KIDDI Web Communications (CPI),Web Host
-secure.ne.jp,KIDDI,ISP
-securednshost.com,IPS Inc.,Web Host
-securemailserver.ca,securemailserver.ca,Email Provider
-securemx.jp,IIJ SecureMX,Email Security
-securence.com,Securence,Email Security
-secureserver.net,GoDaddy,Web Host
-seed.net.tw,Seednet,ISP
-selligent.com,Selligent,Marketing
-sendcloud.io,Sebdcloud,SaaS
-sendcloud.org,Aurora SendCloud,SaaS
-sendgrid.net,Twilio SendGrid,Marketing
-sendio.com,Sendio,Email Security
-sendnode.com,MAILINGWORK,Marketing
-sendoso.com,Sendoso,Marketing
-sensaphone.com,Sensaphone,SaaS
-sentara.com,Sentara,Healthcare
-seqtek.net,SEQTEK,MSP
-servconfig.com,InMotion Hosting,Web Host
-serverdata.net,GoDaddy,Web Host
-serverhost.net,Server Host,Web Host
-serverhs.org,WebHS,Web Host
-serverneubox.com.mx,Neubox,Web Host
-serveroffer.net,Serveroffer,Webhost
-serverpanel.com,Shock Hosting,Web Host
-service-now.com,ServiceNow,SaaS
-servicehoster.ch,Green,Web Host
-servicemail24.de,Arvato Systems,MSP
-servicesennuage.ca,CDT Connexion,MSP
-servidorcostarica.com,HostDime,Web Host
-servidoresdns.net,Arsys,Web Host
-ses-stiftung.de,Schwester Euthymia Stiftung,Healthcare
-sevtelecom.ru,Servastopol Telecom,ISP
-sfr.fr,SFR,ISP
-shamrog.com,Shamrog,Web Host
-shared-server.net,GMO Cloud,Web Host
-shatel.ir,Shatel,ISP
-sheffieldpharma.com,Sheffield Pharmaceuticals,Healthcare
-shield.security,Mailprotector,Email Security
-shizuokaseiki.com,Shizuoka Seiki,Industrial
-shmc.jp,Sainokuni Higashiomiya Medical Center,Healthcare
-shoplocalpharmacy.com,Cardinal Health,Healthcare
-showakvc.co.jp,"Showa Kasei Kogyo Co., Ltd.",Industrial
-showpad.com,Showpad,Marketing
-sibyl.com,Sibl Design,MSP
-signal.no,Signal,ISP
-signium.co.jp,Signium,Consulting
-siho.org,Siho Insurance Services,Finance
-simplystamps.com,Simply Stamps,Retail
-simpro.com.br,Simpro,Healthcare
-simus.uz,Simus,ISP
-sinergit.com.do,Sinergit,MSP
-siriustelecom.uz,Sirius Telecom,ISP
-siteprotect.com,SiteMail,Email Provider
-sitios.win,Sitios Win,Web Host
-sixinternet.com.br,Six Internet,ISP
-sjtransindo.com,Sumatera Jaya Transindo,Logistics
-sknt.ru,Skynet,ISP
-skybroadband.com,Sky,ISP
-sl-reverse.com,IBM Cloud,PaaS
-slgnt.eu,Selligent,Marketing
-slgnt.us,Selligent,Marketing
-slic.com,SLIC Network Solutions,ISP
-smartape.ru,Smart Ape LLC,Web Host
-smartone.com,SmarTone,ISP
-smartservers.com.au,Hostopia Australia,Web Host
-smartspb.net,Smart Telecom,ISP
-smtp.com,SMTP.com,SaaS
-smtp.cz,Active24,Web Host
-smtp25.com,Zix,Email Security
-smtp2go.com,SMTP2GO,SaaS
-snapengage.com,SnapEngage,SaaS
-socgen.com,Societe Generale,Finance
-socialfive.com,Social5,Marketing
-socialservices-ssmd.ca,Social Services Sault Ste. Marie,Government
-socket.net,Socket,ISP
-socoolsolution.com,So Cool Solution,MSP
-sodetel.net.lb,sodetel,ISP
-sofreafurnishings.com,Sofrea Furnishings,Retail
-softbank.jp,SoftBank,ISP
-softbank.ne.jp,SoftBank,ISP
-softvideo.ru,СОФТВИДЕО,ISP
-sonichealthcareusa.com,Sonic Healthcare USA,Healthcare
-sophos.com,Sophos,Email Security
-sosnc.gov,North Carolina Secretary of State,Government
-sougo-group.jp,Camcom Group,SaaS
-spaceship.net,Spaceship,Web Host
-spaceweb.ru,SpaceWeb,Web Host
-spamtitan.com,SpamTitan,Email Security
-sparklight.com,Sparklight,ISP
-sparkpostmail.com,SparkPost,Marketing
-spectrum.com,Spectrum,ISP
-speedway.hk,Speedway Travels,Travel
-speedy.com.ar,Movistar (Formerly Speedy),ISP
-speedy.net.pe,Telefonica del Peru,ISP
-speicherzentrum.de,Speicherzentrum,Web Host
-spglobal.com,S&P Global,Finance
-spintheweb.com,Spin The Web,Web Host
-splashtop.com,Splashtop,Technology
-springernature.com,Springer Nature,Education
-srvape.com,Smart Ape LLC,Web Host
-ssdcloudindia.net,E2E Networks,Web Host
-ssnettelecom.net.br,SSNET Telecom,ISP
-sst2u.com,SST2U,Education
-ssuv.uz,"Samarkand Institute of Veterinary Medicine, Animal Husbandry and Biotechnology",Education
-stackmail.com,20i,Web Host
-stanford.edu,Stanford University,Education
-starchapter.com,StarChapter,SaaS
-stargatecommunications.com,X-Link Limited,ISP
-starhealthagency.com,Star Home Health,Healthcare
-starkmans.com,Starkmans Health Care Depot,Healthcare
-starlinx.com,StrLinX,MSP
-state.co.us,The State of Colorado,Government
-state.ma.us,The State of Massachusetts,Government
-state.ms.us,The State of Missouri,Government
-state.or.us,The State of Oregon,Government
-stcable.net,ST Cable,ISP
-stellarllc.net,Gardonville Cooperative Telephone Association,ISP
-stertec.co.jp,KUNIMORI-STAR Group,MSP
-stetnet.com.br,webby agora é alares,ISP
-stewarthowe.com,Newfold Digital,Web Host
-sti.net,Sierra Tel,ISP
-stjansdal.nl,Hospital St Jansdal,Healthcare
-stokes.nc.us,"Stokes County, North Carolina",Government
-stomabags.com,Stomabags.com,Healthcare
-stonybrook.edu,Stonybrook University,Education
-strategictreasurer.com,Strategic Treasurer,Finance
-stratoserver.net,STRATO,Web Host
-succeed.net,Succeed.net,ISP
-superb.net,CherryRoad (Formerly Superb Internet),Web Host
-supercp.com,a2 hosting,Web Host
-supernetes.tv.br,Supernet,ISP
-superonline.net,Turkcell Superonline,ISP
-supportedns.com,MDD Hosting,Web Host
-sura.ru,Rostelecom,ISP
-sureserver.com,SureSupport LLC,Web Host
-swiftslots.com,SwiftSlots,Web Host
-swishmail.com,Swishmail,MSP
-swisscenter.com,SwissCenter,Web Host
-swisscom.ch,Swisscom,ISP
-syn-alias.com,Synacor,SaaS
-synccentric.com,Synccentric,SaaS
-synchronoss.net,Synchronoss,SaaS
-synthite.co.uk,Synthite,Industrial
-sysaidit.com,SysAid,SaaS
-sysnet.ie,VikingCloud,MSP
-t-ipconnect.de,Deutsche Telekom,ISP
-tachc.org,Texas Association of Community Health Centers (TACHC),Healthcare
-takeda.com,Takeda,Healthcare
-takethemameal.com,Take Them A Meal,SaaS
-tami.pl,TAMI,MSP
-tanglewoodhealth.com,Tanglewood Medical Supplies,Healthcare
-tanomail.com,Tanomail,Retail
-tanzaniaservers.com,Tanzania Servers,Web Host
-tctwest.net,TCT,ISP
-tds.net,TDS,ISP
-teche.net,Uniti,MSP
-teksavvy.com,TekSavvy,ISP
-telebecinternet.com,Telebec,ISP
-telecentro-reversos.com.ar,Telecentro,ISP
-telecom.kz,Kazakhtelecom,ISP
-telecom.net.ar,Telecom Argentina,ISP
-telecomitalia.it,TIM,ISP
-telecomprovider.com.br,Telecom Provider,ISP
-telefonica.de,Telefónica Germany,ISP
-telekom.rs,MTS,ISP
-telenet-ops.be,Telenet BV,ISP
-telenet.be,Telenet,ISP
-telepac.pt,SAPO,Email Provider
-telepacific.net,TPx Communications,ISP
-teleson.net.br,Teleson Telecom,ISP
-telkomsa.net,Telkom,ISP
-tellas.gr,Nova Telecommunications,ISP
-telmex.net.ar,Telmex Argentina,ISP
-telstra.net,Telstra,ISP
-telus.net,TELUS,ISP
-tenders.net,Tenders.net,SaaS
-teol.net,mtel,ISP
-tera-byte.com,Tera-Byte,Web Host
-terra.com,Terra Networks,Web Host
-terra.com.br,Terra Mail,Email Provider
-tevapharm.com,Teva Pharmaceuticals,Healthcare
-texas.gov,The Government of Texas,Government
-tfn.net.tw,Taiwan Fixed Network,ISP
-thcservers.com,THCServers,Web Host
-thechristhospital.com,The Christ Hospital,Healthcare
-thegameshowcompany.ca,The Game Show Company,Entertainment
-thehostgroup.com,The Host Group,Web Host
-thomsonreuters.com,Thomson Reuters,SaaS
-tical.com,Grupo Tical,Logistics
-ticketor.com,Ticketor,Entertainment
-tidewater.net,Tidewater Telecom,ISP
-tie.cl,Telefónica Internet Empresas S.A.,ISP
-tigerconnect.com,TigerConnect,SaaS
-tigertech.net,Tiger Technologies,Web Host
-tigo.com.co,Tigo Columbia,ISP
-tim.it,TIM,ISP
-timeetc.com,Time Etc,SaaS
-timeweb.ru,Timeweb,Web Host
-tisco.mx,TISCO Networks,MSP
-titan.email,Titan,Email Provider
-titanhq.com,TitanHQ,Email Security
-tix.it,Tuscany Internet eXchange,ISP
-tkreal.ru,The Real Group,Logistics
-tktelekom.pl,TK Telecom,Healthcare
-tm.net,Mercury Telecom,ISP
-tmc.edu,Truett McConnell University,Education
-tmcz.cz,T-Mobile,ISP
-tmd.ac.jp,Science Tokyo,Education
-tmdcloud.com,TMDHosting,Web Host
-tmddedicated.com,TMDHosting,Web Host
-tmkultra.net.br,Tmk Net,ISP
-tmodns.net,T-Mobile USA,ISP
-tnc-neuro.com,Tallahassee Neurological Clinic,Healthcare
-tohoku-mpu.ac.jp,Tohoku Medical and Pharmaceutical University,Education
-tohoku.ac.jp,Tohoku University,Education
-tohoyk.co.jp,Toho Pharmaceutical,Healthcare
-top-tokyo.co.jp,TOP CORPORATION,Healthcare
-topauctions24-7.com,TopAuctions24-7,Retail
-tophost.ch,NovaTrend Services,Web Host
-topo.ai,Crisis24,SaaS
-tosis.co.jp,Tosoh Information Systems,MSP
-tosoh.co.jp,Tosoh,Industrial
-tpgi.com.au,TPG,ISP
-tps.uz,TPS Telecom,ISP
-tradeindia.com,TradeIndia,SaaS
-transtelco.net,Flō Networks,ISP
-transtelecom.net,Trans Telecom,ISP
-trendmicro.com,Trend Micro,Email Security
-trendmicro.eu,Trend Micro,Email Security
-trentu.ca,Trent University,Education
-triadefibra.com.br,Tríade Fibra,ISP
-triolan.net,Triolan,ISP
-trivenet.it,Trivenet Telecomunicazioni,ISP
-truemail.co.th,True Internet,ISP
-truman.edu,Trueman State University,Education
-trustifi.com,Trustifi,Email Security
-tsimages.net,TSImages,SaaS
-tsukuba.ac.jp,University of Tsukuba,Education
-ttiinc.com,TTI,Industrial
-ttk.ru,Joint Stock Company TransTeleCom,ISP
-ttn.gob.ar,Tribunal de Tasaciones de la Nación,Government
-ttnet.com.tr,Türk Telekom,ISP
-tufts.edu,Tufts University,Education
-tulsaconnect.com,TULSACONNECT,MSP
-tvactelecom.com.br,TVAC Telecom,ISP
-tvpublica.com.ar,TVP,ISP
-twu.edu,Texas Woman's University,Education
-u-fukui.ac.jp,University of Fukui,Education
-u-tokai.ac.jp,Toki University,Education
-u-tokyo.ac.jp,University of Tokyo,Education
-uab.edu,The University of Alabama at Birmingham,Education
-ualberta.ca,University of Alberta,Education
-ubc.ca,The University of British Columbia,Education
-ucdavis.edu,UC Davis,Education
-uchealth.com,UC Health,Healthcare
-ucla.edu,UCLA,Education
-uclouvain.be,UCLouvain,Healthcare
-ucom.am,Ucom LLC,ISP
-ucom.ne.jp,Tsunagu Network Communications Inc.,ISP
-ufanet.ru,Ufanet,ISP
-ufl.edu,University of Florida,Education
-uhc.com,United Healthcare,Healthcare
-uhu.es,University of Huelva,Education
-uic.edu,University of Illinois Chicago,Education
-uky.edu,University of Kentucky,Education
-ultimatedomain.hosting,Ultimate Domain Hosting,Web Host
-ultravision.com.mx,Ultracel,ISP
-ultraweb.ca,Backland Communications,MSP
-ultrawebhosting.com,Ultra Web Hosting,Web Host
-umbc.edu,"University of Maryland, Baltimore County",Education
-umich.edu,University of Michigan,Education
-umin.ac.jp,University Hospital Medical Information Network (UHIN) of Japan,Healthcare
-umn.edu,University of Minnesota,Education
-unifiedlayer.com,UnifiedLayers,Web Host
-unin.hr,Sveučilište Sjever,Education
-uninet-ide.com.mx,Telmex,ISP
-unity-health.org,Unity Health,Healthcare
-univac.com.sg,Univac,Industrial
-universal-shoji.co.jp,Universal Shoji,Industrial
-untd.com,United Online,ISP
-uoeh-u.ac.jp,"University of Occupational and Environmental Health, Japan",Education
-uol.com.br,UOL - UNIVERSO ONLINE S/A,Web Host
-uplinkcrm.it,Uplink Web Agency Srl,SaaS
-ural-net.ru,inetvdom,ISP
-uscomputers.com,U.S. Computer Corporation,MSP
-usp.br,University of São Paulo,Education
-ussignalcom.net,US Signal,MSP
-usssa.com,USSSA,Sports
-utah.edu,University of Utah,Education
-utelesup.edu.pe,Universidad privada Telesup,Education
-uvm.edu,University of Vermont,Education
-uw.edu,University of Washington,Education
-uzpak.uz,uzpak.uz,Industrial
-v2soft.com,V2Soft,MSP
-va.gov,U.S. Department of Veterans Affairs,Government
-vadesecure.com,Vade Secure,Email Security
-valenet.com.br,Valenet,ISP
-vanwerthospital.org,Van Wert Health,Healthcare
-vdonsk.ru,Microel,ISP
-vectranet.pl,Vectra,ISP
-vedco.com,Vedco,Healthcare
-veetime.com,VeeTIME,ISP
-vegans.it,vegan/s,MSP
-vege.net,vege.net,Web Host
-ventech.com,C1,MSP
-verat.net,BeotelNet,ISP
-verginia.edu,University of Virginia,Education
-verizon.net,Verizon,ISP
-verizonbusiness.com,Verizon Business,ISP
-verointernet.com.br,Internet de Verdade,ISP
-versanet.de,1&1 Versatel,ISP
-vgohosting.com,HostPapa,Web Host
-vicc.co,Venco Imtiaz Contracting Co,Industrial
-victorkaiser.com,Global Transport,Logistics
-videotron.ca,Videotron,ISP
-videotron.com,Videotron,ISP
-viecuri.nl,VieCuri,Healthcare
-viettel.vn,Viettel,ISP
-virginia.edu,The University of Virginia,Education
-virginia.gov,The State of Virginia,Government
-virginm.net,Virgin Media,ISP
-virginmediabusiness.co.uk,Vergin Media Business,ISP
-virtua.com.br,Virtua Brizil,Marketing
-virtualhosting.hk,UDomain,Web Host
-visabeira.co.ao,COMATEL,ISP
-visi.com,US Signal,MSP
-visitmiddlesex.ca,"Middlesex County, Canada",Government
-vismap.it,Industrie Vismap,Retail
-vivozap.com.br,Vivo Mobile,ISP
-vnpt.vn,VNPT,ISP
-vnr.de,VNR Group,SaaS
-vodacom.co.za,Vodacom,ISP
-vodafonedsl.it,Vodafone Itily,ISP
-vodien.com,Vodien,Web Host
-voicehost.co.uk,VoiceHost,PaaS
-voith.com,Voith,Industrial
-volstate.net,IT Voice,MSP
-vom.com,Valley of the Moon,ISP
-vote4mentalhealth.org,NAMI,Healthcare
-votervoice.net,VoterVoice,SaaS
-vpath.co.za,Pathcare Vermaak,Healthcare
-vsu.by,Vitebsk State University,Education
-vtext.com,Verizon SMS,ISP
-vtgus.com,Virtual Technologies Group,MSP
-vtr.net,VTR,ISP
-vulcnmold.com,VulcanMold,Industrial
-vultrusercontent.com,Vultr,Web Host
-vwhs.org,Wally-Wide Health,Healthcare
-vyvebroadband.net,Vyve,ISP
-wadax-sv.jp,WADAX,Web Host
-wadax.ne.jp,WADAX,Web Host
-waldmann.com,Waldmann,Industrial
-wanadoo.fr,Orange,ISP
-washington.edu,University of Washington,Education
-wasip.com,WASIP Ltd.,Healthcare
-wavenetuk.net,Wavenet,MSP
-waypointcentre.ca,Waypoint Centre,Healthcare
-wbhcp.com,Williams Bros Pharmacy,Healthcare
-web-dns1.com,Web Hosting Canada,Web Host
-web-hosting.com,Namecheap,Web Host
-web.africa,Webafrica,ISP
-webbytelecom.com.br,Webby Internet,ISP
-webetic.net,Webetic,Web Host
-webglobe.com,Webglobe,Web Host
-webhostingireland.ie,Hosting Ireland,Web Host
-webland.ch,Webland,Web Host
-webline-servers.com,Webline Services,Web Host
-webmasters.com,Webmasters.com,Web Host
-webnames.ca,Webnames.ca,Web Host
-webninja.com.au,Web Ninja,SaaS
-webpal.com,WebPal,Web Host
-webpal.net,WebPal,Web Host
-webresolver.com,Holistic Technologies,MSP
-websitehostserver.net,GreenGeeks,Web Host
-websupport.se,Websuport,Web Host
-websupport.sk,Websupport,Web Host
-webzi.mx,Webzi,Web Host
-webzine1.com,Webzine Online,Web Host
-webzineonline.com,Webzine Online,Marketing
-wescor.com,Wescor Inc.,Healthcare
-westbrook.ms,Westbrook Construction,Construction
-westdc.net,WestHost,Web Host
-wfn.ca,Westbank First Nation,Government
-what-if.com,The Imagination Factory,MSP
-whitelighthost.net,Acklo,MSP
-wi.gov,The State of Wisconsin,Government
-wightman.ca,Wrightman Telecom,ISP
-wikitelecom.com.br,Wki Telecom,ISP
-willnet.org,WilliNet,ISP
-wind.it,WINDTRE,ISP
-windstream.net,Windstream,ISP
-wise.net.lb,WISE,ISP
-wizmoworks.com,Wizmo,MSP
-wlink.com.np,WorldLink Communications,ISP
-wmaker.net,WMaker,ISP
-wntellecom.net.br,WN Tellecom,ISP
-wolseleyinc.ca,Wolseley Canada,Industrial
-wordpress.com,Wordpress.com,Web Host
-workhorseirons.com,Workhorse Irons,Industrial
-worksmobile.com,Naver Works,SaaS
-wp.pl,Wirtualna Polska,Web Host
-wpx.ne.jp,wpX Speed,Web Host
-wpxhosting.com,WPX Hosting,Web Host
-wsh.care,The Woodlands Specialty Hospital,Healthcare
-wsigenesis.com,Action Hosting,Web Host
-wustl.edu,Washington University in St. Louis,Education
-wylance.com,Emma Solutions (Formerly Wylance),MSP
-xbiz.ne.jp,Xserver,Web Host
-xceleratorsoftware.com,Key Software Systems Xcelerator,SaaS
-xcitium.com,Xcitium,SaaS
-xecu.net,Xecunet,MSP
-xinet.com.mx,Xinet,MSP
-xipline.com,Ritter Communications,ISP
-xmission.com,XMission,SaaS
-xmr3.com,OpenText,SaaS
-xnet.mx,Xnet,MSP
-xrea.com,XREA,Web Host
-xserver.jp,Xserver,Web Host
-xyzservers.com,XYZ Servers,Web Host
-yadtel.net,Zirrus,ISP
-yahoo.co.jp,Yahoo Japan,Email Provider
-yahoo.com,Yahoo,Email Provider
-yamaguchi-u.ac.jp,Yamaguchi University,Education
-yamanashi.ac.jp,Yamanashi University,Education
-yamaoka.co.jp,Yamaoka,Industrial
-yandex.net,Yandex,Email Provider
-yelpcorp.com,Yelp,Social Media
-yesfibra.com.br,YES Fibra,ISP
-yettel.hu,Yettel,ISP
-ykwc.com,Yellowknife Wireless,ISP
-your-server.de,Hetzner,Web Host
-your-site.com,Your-Site.Com,Web Host
-yourconnect.com,Yourconnect,Web Host
-yourhostingaccount.com,Newfold Digital,Web Host
-yukanet.com.br,Ykaline,ISP
-yurekpharmacy.com,Yurek Pharmacy,Healthcare
-yuuai.or.jp,Social Medical Corporation Yuuaikai,Healthcare
-z.com,Z.com,Web Host
-zaansmc.nl,Zaans Medical Center,Healthcare
-zare.com,Zare,Web Host
-zbltelecom.net.br,ZBL Telecom,ISP
-zcmail.net,Zoho Campaigns,Marketing
-zcsend.net,Zoho Campaigns,Marketing
-zdsys.com,Zendesk,SaaS
-zedality.com,Zedality,Web Host
-zirrus.com,Xirrus.com,ISP
-zixcorp.com,Zix,Email Security
-zixsmbhosted.com,Zix,Email Security
-zixworks.com,Zix,Email Security
-zoho.com,Zoho,SaaS
-zoho.eu,Zoho,SaaS
-zoho.in,Zoho,SaaS
-zohocorporation.com,Zoho,SaaS
-zohomail.com,Zoho,SaaS
-zoneedit.com,Zoneedit,Web Host
-zsttk.ru,TTK,ISP
-zyner.net,Zyner,Email Provider
-zyner.one,Zyner,Email Provider
-zyner.org,Zyner,Email Provider
-zzn.com,ZZN,Email Provider
+base_reverse_dns,name,type
+1000island.net,1000 Island,ISP
+101-clientes-izzi.mx,Izzi Telecom,ISP
+118-clientes-izzi.mx,Izzi Telecom,ISP
+163data.com.cn,China Telecom,ISP
+197-clientes-izzi.mx,Izzi Telecom,ISP
+1e100.net,Google,Technology
+263.net,263,Email Provider
+2day.kz,2DAY Telecom LLP,ISP
+360group.es,360 group,Web Host
+3bb.in.th,3BB,ISP
+3dprintingindustry.com,3D Printing Industry,Industrial
+3kt.eu,3K Technology,MSP
+4gbhost.com,4GBHost,Web Host
+82-165-19-207.plesk.page,Digital Health Portal,Healthcare
+93-clientes-zap-izzi.mx,Izzi Telecom,ISP
+98-clientes-izzi.mx,Izzi Telecom,ISP
+a2hosting.com,A2Hosting,Web Host
+aaltoscientific.com,Aalto Scientific,Healthcare
+aams6.jp,"BroadBand Security, Inc",MSSP
+ab-group.biz,AsiaBell,ISP
+abchk.net,ABCHK,Web Host
+abnormal-email.com,Abnormal AI,Email Security
+academiasupport.org,Academia Support Japan,Education
+accessmedlab.com,Access Medical Labs,Healthcare
+acelerate.net,AXS Bolivia S. A.,ISP
+acessecomunicacao.com.br,Acesse,ISP
+acessoline.net.br,Alt Telecom,ISP
+activegate-ss.jp,Active! gate SS,Email Security
+adairit.com,Adair IT,MSP
+additionnetworks.net,CherryRoad Technologies,MSP
+admintek.net,Admintek,Web Host
+admintekcr.net,Admintek,Web Host
+admiral.ne.jp,ASJ,ISP
+adnhosting.ca,ADN Communications,Web Host
+adnsl.com,ADN Telecom,ISP
+adp.com,ADP,Finance
+adrz.nl,Adrz,Healthcare
+adsl-pool.sx.cn,China Unicom,ISP
+adventconstructions.co.tz,Advent Construction Limited,Industrial
+aeroinc.net,The Areo Group,Industrial
+aesbg.net,AESNET,ISP
+aeza.network,Aeza,Web Host
+af-k.de,I-NetPartner GmbH,ISP
+afghan-wireless.com,Afghan Wireless,ISP
+afnet.net,AFNET,ISP
+afriminesa.com,Afrimine Southern Africa,Industrial
+agencia-atlas.com,Groupo Atlas,Logistics
+agoda.com,Agoda,Travel
+aichi-colony.jp,Aichi Developmental Disability Center,Healthcare
+aigmedical.com,Affiliates in Gastroenterology,Healthcare
+aila.org,American Immigration Lawyers Association,Nonprofit
+aircleaningspecialists.com,"Air Cleaning Specialists, Inc.",Industrial
+aircomusa.com,FaxPipe (Formerly AirCom USA),SaaS
+airgas.com,Airgas,Industrial
+airtel.co.zm,Airtel,ISP
+airtel.in,Airtel,ISP
+airtelbroadband.in,Airtel,ISP
+airtelkenya.com,Airtel,ISP
+ajrmexico.net,AJR,Logistics
+ajusa.com,AJ-USA,Retail
+aknet.kg,AkNet,ISP
+akura.ne.jp,Akura,Logistics
+albatros.uz,Albatros Health Care,Healthcare
+alembic.co.in,Alembic Pharmaceuticals,Healthcare
+alestra.net.mx,Alestra,ISP
+aliyun.com,Alibaba Cloud,Web Host
+alliancebroadband.in,Alliance Broadband,ISP
+almanet.net,Alma Communications,ISP
+alpha-mail.net,Otsuka Corporation,MSP
+alpha-prm.jp,Otsuka Corporation,MSP
+altel.kz,Atal,ISP
+altmanadvisors.com,Altman Advisors,Finance
+altovalenet.com.br,Alto Vale Net,ISP
+alwaysdata.com,alwaysdata,Web Host
+amazon.com,Amazon,Technology
+amazonaws.com,Amazon Web Services (AWS),PaaS
+amazonses.com,Amazon SES,SaaS
+ambisys.net,Ambisys,Healthcare
+america.net,America.net,Web Host
+americanam.org,American Advanced Management,Healthcare
+amethyst.co.jp,Amethyst,Healthcare
+ampernet.com.br,Ampernet,ISP
+amplia.co.tt,AMPLIA,ISP
+anet.net.th,ANET,ISP
+antelecom.net,Antelecom,ISP
+anti-spam-premium.com,Liquid Web,Web Host
+antilles-sante.com,AAS Medical,Healthcare
+antispamcloud.com,N-able,Email Security
+antispameurope.com,Hornetsecurity,Email Security
+anylogic.com,AnyLogic,SaaS
+aplusgroup.net,A Plus International,Healthcare
+apple.com,Apple,Email Provider
+applicationx.net,Application X,MSP
+appriver.com,OpenText AppRiver,Email Security
+aps-inc.co.jp,Arahi Polyslider,Industrial
+aqmhost.net,AqmHost,Web Host
+aragon.es,Government of Aragon,Government
+archerirm.us,Archer GRC,SaaS
+arena.ne.jp,WebARENA,ISP
+arizona.edu,University of Arizona,Education
+arpinet.am,Arpinet,ISP
+artehosting.com.mx,Artehosting,Web Host
+aruba.it,Aruba.it,Web Host
+as42831.net,UK Dedicated Servers,Web Host
+asahikawa-med.ac.jp,Asahikawa Med,Healthcare
+ashtelstudios.com,Ashtel Studios,Healthcare
+asiaitserver.com,Asia IT Solution Co.,MSP
+asianet.co.th,Ttur Internet Corporation,ISP
+askbis.com,BIS,Web Host
+asl2.liguria.it,ASL2,Healthcare
+asmecal.it,ASMENET CALABRIA,Government
+assaytechnology.com,Assay Technology,Industrial
+assentportal.com,Assent,SaaS
+assp.org,American Society of Safety Professionals,Healthcare
+asteria.com,Asteria,SaaS
+atmailcloud.com,atmail,Email Provider
+ats.ca,ATS Healthcare,Healthcare
+atw.ne.jp,ATW,Web Host
+au-net.ne.jp,KDDI,ISP
+au.com,au,ISP
+auone-net.jp,KDDI,ISP
+aussiebb.com.au,Aussie Broadband,ISP
+autotask.net,Kaseya,SaaS
+averypartners.net,Avery Partners,Healthcare
+avis.ne.jp,Densan Avis,ISP
+aviso.ci,Orange,ISP
+avnam.net,VPS Argentina,Web Host
+awasr.om,Awasr,ISP
+awm.com.tr,Yöncü Bilişim Çözümleri Limited Şirketi,Web Host
+axspace.com,AXspase,Web Host
+axtel.net,Axtel,ISP
+azeronline.com,Azeronline,ISP
+azteca-comunicaciones.com,Aztec Communications Columbia,ISP
+azure.com,Microsoft Azure,PaaS
+backland.net,Backland Communications,MSP
+balifiber.id,BaliFiber,ISP
+banchero.org,Bancharo Disability Services,Healthcare
+barracuda.com,Barracuda,Email Security
+barvanet.kz,Barvanet,MSP
+basketnews.lt,BasketNews,Sports
+bayada.com,BAYADA Home Health Care,Healthcare
+bayer.de,Bayer,Healthcare
+bayoulandcs.com,Bayouland Computer Solutions,MSP
+bbemaildelivery.com,BombBomb,Marketing
+bbnetup.com.br,BBNET UP,ISP
+bbtel.com,BBTEL,ISP
+bcs.org,BCS,Nonprofit
+beaumont.org,Corewell Health (Formerly Beaumont),Healthcare
+bell.ca,Bell Canada,ISP
+bell.net,Bell Canada,ISP
+benkan.co.jp,Benkan,Industrial
+berea.edu,Berea College,Education
+betterhomeowners.com,InTouch Systems,Marketing
+bezeqint.net,Bezeq International,ISP
+bigcommerce.net,BigCommerce,SaaS
+biglobe.ne.jp,BIGLOBE,ISP
+bigpond.com,Telstra,ISP
+bigscoots.com,BigScoots,Web Host
+biodose.com,BioDose,Healthcare
+biotika.sk,Biotika,Healthcare
+bisno1.co.jp,"Bis Co., Ltd.",Construction
+bisv.ru,Bisv.ru,ISP
+blackfriarsam.com,Blackfriars Asset Management,Finance
+blacknight.com,Blacknight Solutions,Web Host
+blanksoft.dev,BlankSoft,MSP
+blitzmediahosting.ca,Blitz Media,Web Host
+bls.gov,U.S. Bureau of Labor Statistics,Government
+bluehost.com,Bluehost,Web Host
+bluemission.net,Blue Mission,Web Host
+bluesea.org,Blue Sea Foundation,Marketing
+bluetie.com,BlueTie,MSP
+bnpparibas.fr,Banque BNP Paribas,Finance
+bohc.co.jp,Benefit One Inc.,Retail
+bookingtimes.com,BookingTimes,SaaS
+bostrad.com,Bostrad Supply Chain Ltd,Logistics
+bov.com,Bank of Valletta,Finance
+bracnet.net,BRACNet Limited,ISP
+brasildigital.net.br,Brasil Digital Telecom,ISP
+bravehost.com,Bravenet,Web Host
+bravenet.com,Bravenet,Web Host
+braveriver.com,Brave River,MSP
+breakthru.net,BreakThru,MSP
+bredband2.com,Broadband2,ISP
+breezein.net,BRIZ,ISP
+breezelineohio.net,Breezeline,ISP
+bright.net,CNI,ISP
+brightspace.com,D2l Brightspace,SaaS
+brinkster.com,Brinkster,Web Host
+brisanet.net.br,Brisianet,ISP
+broadridge.com,Broadridge,Finance
+btc-net.bg,Viacom,ISP
+btopenworld.com,BT,ISP
+bugtusselwireless.com,Bug Tussel,ISP
+bulsat.com,Bulsatcom,ISP
+bumblebeelinens.com,Bumbletree Linens,Retail
+bunkaren.or.jp,Japan Culture and Welfare Federation of Agricultural Cooperatives,Agriculture
+burnhamholdings.com,Burnham Holdings,Industrial
+buroserv.net.au,Brunoserv,ISP
+cable.net.co,Cablenet,ISP
+cablecom.ch,UPC,ISP
+cableonda.net,Cable Onda,ISP
+cabletel.com.mk,A1,ISP
+cablevision.net.mx,Izzi Telecom,ISP
+cairohost.com,Black Host,Web Host
+caiway.nl,Caiway,ISP
+calero.com,Calero,MSP
+calpoly.edu,Cal Poly,Education
+calvin.edu,Calvin University,Education
+canonet.ne.jp,Canonet,MSP
+carandainet.com.br,CN Internet,ISP
+cardhealth.com,Cardinal Health,Healthcare
+cardinal.com,Cardinal Health,Healthcare
+cardinalhealth.com,Cardinal Health,Healthcare
+carecentrix.com,CareCentrix,Healthcare
+carrierzone.com,carrierzone,Email Security
+carsforkids.org,Cars For Kids,Nonprofit
+case.edu,Case Western Reserve University,Education
+castrum.com.br,Castrum Internet,ISP
+catnet.jp,Honjo Cable,ISP
+cbe.ae,CBE,Construction
+cbwchc.org,Charles B. Wang Community Health,Healthcare
+ccc-group.com,Canada Colors and Chemicals Limited (CCC),Industrial
+cdbhospital.com,CBD Hospital,Healthcare
+celeste.fr,CELESTE,ISP
+centerasecurity.com,Centera Email Defence,Email Security
+centerasecurity.dk,Centera Email Defence,Email Security
+centralesupelec.fr,CentraleSupélec,Education
+centralinteractiva.com.mx,Central Interactiva,Marketing
+centralnetx.com.br,Centralnet,ISP
+centurylink.com.pe,Cirion,MSP
+certronic.com.ar,Certronic,SaaS
+ch-saintcalais.fr,Centre Hospitalier du Mans,Healthcare
+chaiyohosting.com,Chaiy oHosting,Web Host
+changethatup.com,Change That Up,Healthcare
+charter.net,Charter,ISP
+chiba-u.jp,Chiba University,Education
+chikamori.com,Chikamori Health Care Group,Healthcare
+childrenscolorado.org,Children's Hospital Colorado,Healthcare
+childrenshospital.org,Boston Children's Hospital,Healthcare
+chinamobile.com,China Mobile,ISP
+chinaunicom.cn,China Unicom,ISP
+chinaxingye.com,Suzhou Sinye Materials Technology,Industrial
+ciliotech.com,Cilio,SaaS
+cimcorp.com,Cimcorp,Industrial
+circleamedical.com,Circle A Medical,Healthcare
+cirrushosting.com,Cirrus Hosting,Web Host
+cisco.com,Cisco,Technology
+cityemail.com,CityEmail,Email Provider
+ckt.net,Craw-Kan Telephone Cooperative,ISP
+clarix.com,Clarix,MSP
+claro.com.do,Claro,ISP
+claro.com.ec,Claro,ISP
+claro.net.do,Mail2World,Email Provider
+claytonindustries.com,Clayton Industries,Industrial
+clearwave.com,Clearwave Fiber,ISP
+clemson.edu,Clemson University,Education
+clicktelecomunicacoes.com.br,Click Telecomunicações,ISP
+climaideal.com,Clima Ideal,Retail
+clinique-saint-george.com,Polyclinique Saint George,Healthcare
+cloud-sec-av.com,Check Point Avanan,Email Security
+cloudezapp.io,EmailHeads.NET,Marketing
+cloudfilter.net,Proofpoint Cloudmark,Email Security
+cloudflare-email.com,Cloudflare,Email Security
+cloudflare-email.net,Cloudflare,Email Security
+cloudflare.net,Cloudflare,SaaS
+clouditalia.com,Retelit,Web Host
+cloudwaysapps.com,Cloudways,Web Host
+cloudwebhosting.com,NameHero,Web Host
+clsvrsystems.net,GMO Cloud,IaaS
+clubexpress.com,ClubExpress,SaaS
+cniteam.com,CNI,ISP
+cod.edu,College of DuPage,Education
+codetel.net.do,codetel.net.do,ISP
+coeficiente.net.mx,Coeficiente,ISP
+coex.co.kr,COEX,Marketing
+cogeco.ca,Cogeco,ISP
+cogeco.net,Cogoco,ISP
+cognizant.com,Cognizant,Technology
+collectivhosting.com,Collectiv,Web Host
+colocrossing.com,ColoCrossing,ISP
+colos.kz,IFC COLOS,Logistics
+combell.com,Combell,Web Host
+comcast.net,Comcast,ISP
+comcastbusiness.net,Comcast Business,ISP
+comfori.com,Comfori,SaaS
+comline.com,West Coast Internet (WCI),ISP
+communitect.com,Solutionreach,SaaS
+communitymedical.org,Community Medical Centers,Healthcare
+complemar.com,Complemar,Logistics
+compliancearchitects.net,Compliance Aarchitects,Healthcare
+compu-type.net,Compu-Type,MSP
+computerguyz.ca,Computer Guyz,MSP
+computronics.com,Computronics,Technology
+comune.livorno.it,Città di Livorno,Government
+comunitel.net,Vodafone,ISP
+concurcompleat.com,Concur Compleat,SaaS
+concursolutions.com,SAP Concur,SaaS
+condosites.net,CondoSites,SaaS
+conoha.ne.jp,ConoHa,Web Host
+consolidatedlabel.com,Consolidated Label,Print
+constantcontact.com,Constant Contact,Marketing
+consumermedsafety.org,Institute for Safe Medication Practices,Healthcare
+contaboserver.net,Contabo,Web Host
+convention.co.jp,Japan Convention Services,Marketing
+convergent-interfreight.com,Convergent Interfreight,Logistics
+convergentindia.com,Convergent Wireless,MSP
+coopenet.com.ar,Coopenet,ISP
+corbina.ru,PJSC VimpelCom,ISP
+corblock.com,Corblock,Industrial
+corewellhealth.org,Corewell Health,Healthcare
+cornell.edu,Cornell University,Education
+cotecal.com.ar,Cotecal,ISP
+cotton-warehouse.com,Cotton Warehouse Classic Cars,Automotive
+coucou-networks.fr,Free Mobile,ISP
+cox.net,Cox Communications,ISP
+cp247.net,M247,Web Host
+cpanelhost.cl,cPanelHost,Web Host
+cpi.ad.jp,CPI,Web Host
+cpi340b.com,Contract Pharmacy Insight,Healthcare
+cpsinet.com,TruBridge,Healthcare
+creehan.com,Inovalon (Formerly Creehan & Company),Healthcare
+crossinx.com,Unifiedpost Group,SaaS
+crowncloud.net,CrownCloud,Web Host
+crxmgmt.com,The Medicine Shoppe Franchisee,Healthcare
+csloxinfo.com,CSL,MSP
+csod.com,Cornerstone,SaaS
+ctbcbank.com.ph,CTBC Bank (Philippines) Corp.,Finance
+ctbctelecom.com.br,Algar Telecom,ISP
+ctl.one,CenturyLink,ISP
+cubiespot.net.id,Cubiespot,ISP
+cuenote.jp,Cuenote,SaaS
+cvent-planner.com,Cvent,SaaS
+cvtsv.com,Cvent,SaaS
+cwmc.com.br,CWMC,ISP
+cwru.edu,Case Western Reserve University,Education
+cyberfuel.com,Cyberfuel.com,Web Host
+cyberlynk.net,CyberLynk,MSP
+cybermail.jp,CyberMail,Email Provider
+cybernextech.co.th,CYBER NEXTECH,Web Host
+cyfrowypolsat.pl,Polsat Box,ISP
+cyon.net,Cyon,Web Host
+d2s.cloud,d2s.cloud,Web Host
+daemonmail.ner,DaemonMail,Email Provider
+dailyinvesthub.com,Daily Invest Hub,Finance
+dailyrazor.com,DailyRazor,Web Host
+damcogroup.com,Damco Solutions,MSP
+damel.com,Damel Group,Food
+daraju.com,Daraju,Healthcare
+darysoft.com,Dary Web Designs,Web Host
+datanat.com,Datanational Corporation,MSP
+datawagon.net,DataWagon,Web Host
+dattar.com.ar,Dattar,MSP
+dattaweb.com,HostMar,Web Host
+daystar.io,Daystar Email Service,Email Provider
+ddccommunications.com,DDC public affairs,Marketing
+default-host.net,INHOSTED LP,Web Host
+delhitel.net,Delhi Telephone Company,ISP
+deliverychain.io,Delivery Chain,SaaS
+deskwing.net,DESKWING,Email Provider
+dexanet.co.id,Dexanet,ISP
+dfn.nl,DELTA Fiber,ISP
+dgsys.es,DGsys,Web Host
+dhl.com,DHL,logistics
+diakovere.de,DIAKOVERE,Healthcare
+digijadoo.net,Jadoo Digital,ISP
+digikabel.hu,One Hungary (Formerly DIGI),ISP
+digitalairstrike.com,Digital Air Strike,Marketing
+digiturunc.com,Digiturunc,Web Host
+dimenoc.com,HostDime.com,Web Host
+directnic.net,Directnic.com,Web Host
+directwifi.com.br,Direct Internet,ISP
+discovergreene.com,"Greene County, New York",Government
+disenosweb.mx,Hive Studio,Web Host
+dishemail.com,DISH,ISP
+dji.com,DJI,Technology
+dlivry.co,Twilio SendGrid,Marketing
+dmmhosts.com,DMM Hosts,Web Host
+dnchosting.com,Directnic,Web Host
+dnns.net,No-IP Dynamic DNS,Web Host
+dnsthai.com,Aptum Technologies,MSP
+doctors.org.uk,Doctors.net.uk,Healthcare
+domaincentral.com.au,Domain Central,Web Host
+domaineinternet.ca,Rapidenet Canada,Web Host
+domainit.com,DomainIt,Web Host
+donpac.ru,Rostelecom,ISP
+dosscloudservices.com,Doss Business Systems,MSP
+doteasy.com,Doteasy,Web Host
+dotinternetbd.com,DOT Internet,ISP
+dotroll.com,DotRoll,Web Host
+downloaddatarecovery.com,KernelApps,Technology
+draminski.com,Dramiński Technology,Healthcare
+dreamcompute.com,Dreamhost,Web Host
+dreamhost.com,Dreamhost,Web Host
+dreamhostps.com,Dreamhost,Web Host
+drive.ne.jp,Drive Network,Web Host
+drjapan-jp.com,"Dr. Japan Co., Ltd.",Healthcare
+dslon.ws,Dslon Wireless,ISP
+dsmc.or.kr,Keimyung University Dongsan Medical Center,Healthcare
+dsw.com,DSW,Retail
+dtel.com.br,Dtel Telecom,ISP
+dts-security.de,DTS,MSP
+duck.com,DuckDuckGo,Search Engine
+dvcotechnology.com,Cision,Marketing
+dwgreen.com,DW Green Company,Marketing
+dwit.co.kr,Daewon Information Technology Co.,MSP
+dynadot.com,Dynadot,Web Host
+dynamic-mytachyon.in,Tachyon Communications,ISP
+dyspatchit.net,Dyspatchit,Marketing
+e-mmunity.net,VIPRE,Email Security
+e2ma.net,Emma,Marketing
+eaglecom.net,Vyve Broadband,ISP
+eastern-tele.com,Eastern Communications,ISP
+easterndsl.com.ph,Eastern Communications,ISP
+eastlink.ca,Eastlink,ISP
+easy-hebergement.net,Easy-Hébergement,Web Host
+easydns.com,easyDNS,Web Host
+easymail.ca,easyMail,Email Provider
+easyseo.com.my,SEO Services Malaysia,Marketing
+easyweb.com,easyDNS,Web Host
+eboundhost.com,eBoundhost,Web Host
+echolabs.net,Echo Labs,MSP
+echoworx.net,Echoworx,Email Security
+ecm8.com,Campaign Master (UK),Marketing
+ecritel.net,Ecritel,MSP
+edgepark.com,Edgepark,Healthcare
+edu.com,InstructionalAssistant,SaaS
+eduneering.com,UL EHS training,SaaS
+egov.com,Tyler Technologies,SaaS
+egress.cloud,Egress Software,Email Security
+egs-seg.gc.ca,Canada Government Electronic Directory Services (GEDS),Government
+ehafconsulting.org,EHAF Consulting Engineers,Construction
+ehime-u.ac.jp,Ehime University,Education
+ehostsolution.net,E Host Solution,Web Host
+eigbox.net,Newfold Digital,Web Host
+einsteinmail.com,Einstein Industries,Web Host
+eircom.net,Eir,ISP
+ejpress.com,eJournalPress,SaaS
+elcat.kg,ElCat,ISP
+elcom.ru,Rostelcom,ISP
+electric.net,VIPRE,Email Security
+elevatedstudios.tech,Elevated Studios,Web Host
+eleven.mx,Eleven Marketing Labs,Marketing
+elive.net,Elive,Web Host
+ellipse.net,Ellipse,MSP
+elmecnet.net,Elmec Informatica,MSP
+elnk.net,Earthlink,ISP
+email-od.com,SocketLabs,SaaS
+emailarray.com,Emailarray,Email Provider
+emailowl.com,NameSilo,Web Host
+emailsecurity.app,Mesh Security,Email Security
+emailservice.io,Mailprotector,Email Security
+emailsrv.net,Mailprotector,Email Security
+emailsrvr.com,Rackspace Email,Email Security
+emberpoint.com,Ember Point,SaaS
+empaquesmundiales.com,Empaques Mundiales,Industrial
+emporiaresearch.com,Emporia,SaaS
+emsecure.net,Selligent,Marketing
+emsend2.com,ActiveCampaign,Marketing
+encrypttitan.net,EncryptTitan,Email Security
+enguard.com,EnGuard,Email Security
+eninetworks.com,ENI Networks,ISP
+entelchile.net,Entel,ISP
+entelvias.com.br,Entelvias,ISP
+enternetprovedor.com.br,Enternet,ISP
+entrata.com,Entrata,SaaS
+entrustedmail.net,EntrustedMail,Email Security
+eonemedia.com,eOneMedia,Photography
+epicpc.com,Epic Health,Healthcare
+epicura.be,EpiCURA,Healthcare
+epsl1.com,Publicis Groupe,Marketing
+erie.gov,"Erie County, New York",Government
+erlabrunn.de,Kliniken Erlabrunn,Healthcare
+ertelecom.ru,ER-Telecom,ISP
+eskerondemand.com,Esker,SaaS
+etc.uz,East Telecom,ISP
+etex.net,Etex,ISP
+etik-cloud.com,Infomaniak,IaaS
+etipres.com,ETIPRES,Print
+etius.jp,WebArena,Web Host
+etouches.com,Stova,SaaS
+eventsairmail.com,EventsAir,SaaS
+evernet.net.co,Evernet,ISP
+evertecinc.com,Evertec,Finance
+evertecpr.com,Evertec,Finance
+exacthosting.com,Exact Hosting,Web Host
+exactt.com,Salesforce Marketing Cloud (Formerly ExactTarget),Marketing
+exacttarget.com,Salesforce Marketing Cloud (Formerly ExactTarget),Marketing
+execulink.net,Execulink Telecom,ISP
+expedia.net,Expedia,Travel
+explori.com,Explori,Event Planning
+expositltd.com,Exposit Ltd.,MSP
+express.com.ar,Express Telecomunicaciones,ISP
+ezorg.nl,E-Zorg,Healthcare
+fap.mil.pe,La Fuerza Aérea del Perú (FAP),Government
+fast.net.id,Linknet-Fastnet,ISP
+fastnet.kg,FastNet,ISP
+fastspeed.dk,Fastspeed,ISP
+feasa.ie,Feasa,Industrial
+fedex.com,FedEx,Logistics
+ferreterialindavista.com,Somos Ferreteria Lindavista,Retail
+fetnet.net,FETNet,ISP
+fgl.com.mx,Francisco Garcia Lopez,Healthcare
+fiberhub.com,FiberHub,ISP
+fibertel.com.ar,Personal,ISP
+fibextelecom.net,Fibex Telecom,ISP
+fibralink.net.br,Fibralink,ISP
+fibrenoire.ca,fibrenorie,ISP
+fireeyecloud.com,FireEye,Email Security
+fireeyegov.com,FireEye (Government),Email Security
+firstcloudsecurity.net,CyberCision,Email Security
+fisherpaykel.com,Fisher & Paykel,Retail
+fisquare.com,Infince,SaaS
+flashmaistelecom.com.br,Flash + Telecom,ISP
+fleetviolations.com,ATS Processing Services,Logistics
+flinnsci.com,Flinn Scientific,Healthcare
+floridaurologypartners.com,Florida Urology Partners,Healthcare
+flywheelsites.com,Flywheel,Web Host
+fmc-na.com,Fresenius Medical Care,Healthcare
+fmcna.com,Fresenius Medical Care,Healthcare
+fmu.ac.jp,Fukushima Medical University,Education
+fonacit.gob.ve,Fonacit,Government
+foodtecsolutions.com,FoodTec Solutions,SaaS
+formassembly.com,FormAssembly,SaaS
+forpsi.com,Forpsi,Web Host
+forthnet.gr,Nova,ISP
+fortimail.com,Fortinet FortiMail,Email Security
+fortimailcloud.com,Fortinet FortiMail Cloud,Email Security
+forwardemail.net,ForwardEmail.net,Email Provider
+fourseasonspediatrics.com,Four Seasons Pediatrics,Healthcare
+francedns.com,Eurofiber France,ISP
+franchisemail.net,FranConnect,SaaS
+franweb.net.br,FRAN WEB,ISP
+freehostia.com,Freehostia,Web Host
+freehosting.com,FreeHosting.com,Web Host
+freemail.hu,Freemail bejelentkezés,Email Provider
+frontiir.com,FRONTiiR,MSP
+fuertehoteles.com,Fuerte Group Hotels,Travel
+fujibake.co.jp,Fuji Bakelite,Industrial
+fujita-hu.ac.jp,Fujita Health University,Healthcare
+funeralone.net,funeralOne,SaaS
+fuse.net,Altafiber (Formerly Cincinnati Bell),ISP
+fusionconnect.com,Fusion Connect,MSP
+future-bridge.eu,Future Bridge Events,Marketing
+gaggle.net,Gaggle,SaaS
+gallerycollection.com,The Gallery Collection,Retail
+gandi.net,Gandi.net,Web Host
+gastrogainesville.com,Gastroenterology Associates of Gainesville,Healthcare
+gatormail.co.uk,Spotler,Marketing
+gazella.es,Orix Systems,MSP
+gci.net,GCI,ISP
+gcicom.net,Nasstar,MSP
+gcrcompany.com,GCR Company,MSP
+gearhost.com,GearHost,Web Host
+gen2fund.com,Gen II,Finance
+generalinformatix.net,General Informatix,Technology
+genoray.com,GENORAY,Healthcare
+genstarnetcable.com,Gennstar Network Solutions,ISP
+gerberlife.com,Gerber Life Insurance,Finance
+ggsv.jp,Techorus,Web Host
+ghm-grenoble.fr,Groupe hospitalier mutualiste de Grenoble,healthcare
+glasgow-ky.com,Glasgow EPB,ISP
+glesys.net,GleSYS,Web Host
+glink.inf.br,Glink,Web Host
+gln.net.br,Global Lines,ISP
+globalit.com,Global IT,MSP
+gmoserver.jp,GMO,Web Host
+gmu.edu,George Mason University,Education
+gmx.com,GMX,ISP
+gmx.net,GMX,ISP
+godaddy.com,GoDaddy,Web Host
+goldmedimport.com.br,Goldmed import,Healthcare
+gom.co.za,Graytown Office Machines,MSP
+google.com,Google (Including Gmail and Google Workspace),Email Provider
+googleusercontent.com,Google Cloud Platform (GCP),PaaS
+gosecure.net,GoSecure,Email Security
+goskope.com,Netskope,Email Security
+gov.in,Indian government,Government
+gpphosted.com,Proofpoint (Government),Email Security
+grainger.ca,Grainger Industrial Supply,Industrial
+grainger.com,Grainger Industrial Supply,Industrial
+graysmark.net,Graysmark Business Systems,MSP
+greenarrowmail.com,GreenArrow,SaaS
+greenconsulting.it,Green Consulting,MSP
+grupocybernet.com.br,Grupo Cybernet,ISP
+gruposalinas.com.mx,Groupo Salinas,Conglomerate
+gsbridge.com,Golden State Bridge,Industrial
+gtnexus.com,Infor Nexus (Formerly GT Nexus),SaaS
+gts.sk,GTS Slovakia,ISP
+guardedhost.com,Omnis Network,Web Host
+gunma-u.ac.jp,Gunma University,Education
+gva.es,Generalitat Valenciana,Government
+gwu.edu,The George Washington University,Education
+h-isac.org,H-ISAC,Healthcare
+hammacher.com,Hammacher Schlemmer,Retail
+han-solo.net,hostNET,Web Host
+hanami.run,Mailwip (Formerly Hanami),Email Provider
+hanastar.net.id,HSnet,ISP
+hap.be,CHU Ambroise Paré,Healthcare
+harrishealth.org,Harris Health System,Healthcare
+harvard.edu,Harvard University,Education
+hathway.com,Hatchway,ISP
+hctc.net,Hill County Telephone Cooperative (HXTC),ISP
+hdems.com,HENNGE Mail Archive,SaaS
+hdsupply-email.com,HD Supply,Retail
+healthall.com,UC Health,Healthcare
+healthcaresupplypros.com,Healthcare Supply Pros,Healthcare
+healthproductsforyou.com,Health Products For You,Healthcare
+helloserver6.com,1st Source Web,Marketing
+helpforcb.com,InterServer,Web Host
+helpscout.net,Help Scout,SaaS
+herbion.com,Herbion,Healthcare
+heteml.jp,GMO,Web Host
+hey.com,HEY,Email Provider
+heywoodhill.com,Heywood Hill,Retail
+hhsys.org,Huntsville Hospital,Healthcare
+hickorytech.net,Consolidated Communications,ISP
+highmark.com,Highmark,Healthcare
+highradiuscorp.com,HighRadius,Finance
+highspot.com,Highspot,Marketing
+highwire.org,HighWire,SaaS
+hinet.net,HiNet,ISP
+hiwaay.net,HuWAAY,ISP
+hiworks.co.kr,hiworks,SaaS
+hmcaguas.com,Puerto Rico Telephone Company,ISP
+hoaspace.com,HOA Space,SaaS
+hokudai.ac.jp,Hokkaido University,Education
+hol.gr,Vodafone,ISP
+homesteadhealthcareservices.com,Homestead Health Care Services,Healthcare
+hornetsecurity.com,Hornetsecurity,MSSP
+hosp.kaizuka.osaka.jp,Kaizuka City Hospital,Healthcare
+hostatom.com,hostatom,Web Host
+hosted-by-robovps.ru,RoboVPS,Web Host
+hostedemail.com,HostedEmail.com,Email Provider
+hostek.com,HOSTEK,Web Host
+hosteurope.de,Host Europe,Web Host
+hostglobal.plus,HOSTGLOBAL.PLUS,Web Host
+hostguy.com,hosting.india.to,Web Host
+hostico.ro,HOSTICO,Web Host
+hosting-mexico.net,Hosting-Mexico,Web Host
+hosting-universal.com,Hosting Universal,Web Host
+hosting.ie,Irish Domains Limited,Web Host
+hostinger.io,Hostinger,Web Host
+hostlife.net,HOSTLIFE,Web Host
+hostmonster.com,Hostmonster,Web Host
+hostnet.nl,Hostnet,Web Host
+hostneverdie.com,Hostneverdie,Web Host
+hostpacific.com,HostPacific.com,Web Host
+hostpapavps.net,HostPapa,Web Host
+hostpoint.ch,Hostpoint,Web Host
+hostresolver.net,Stack Harbor,Web Host
+hosts.co.uk,Namesco Limited,Web Host
+hostsecure.us.com,WordPress US Hosting,Web Host
+hostsevenplus.com,HostSevenPlus,Web Host
+hostspeedy.com,Host Speedy,Web Host
+hostwindsdns.com,Hostwinds,Web Host
+hotnet.net.il,Hot Net Internet Services,ISP
+hringdu.is,Hringdu,ISP
+hspherefilter.com,"DynamicNet, Inc. (DNI)",Web Host
+htc.net,HTC,ISP
+htmlservices.it,HTMLServices.it,MSP
+hubspotemail.net,HubSpot,Marketing
+hugel-inc.com,Hugel,Healthcare
+hughes.net,Hughes Network Systems,ISP
+hughston.com,Hughston Clinic,Healthcare
+hvvc.us,Hivelocity,Web Host
+i2ts.ne.jp,i2ts,Web Host
+i4i.com,i4i,Technology
+ice.co.cr,Grupo ICE,Industrial
+icehosting.nl,IceHosting,Web Host
+icewarpcloud.in,IceWrap,Email Provider
+icoremail.net,Coremail,Email Provider
+ideaservers.net,Hetzner,Web Host
+identibitsuisse.ch,identibit suisse,Marketing
+idig.net,Canadian Web Hosting,Web Host
+idodns.com,IDO DNS,MSP
+ifeelfree.co.nz,I Feel Free,MSP
+iftnet.com.br,IFTNET Telecom,ISP
+iglou.com,IgLou Internet Services,ISP
+iij4u.or.jp,Internet Initiative Japan,ISP
+ik2.com,Spamflare,Email Security
+ilap.com,ILAP,ISP
+imanila.ph,iManila,Marketing
+imcconseil.fr,IMC Conseil,MSP
+improvmx.com,ImprovMX,Email Provider
+impulsahosting.com,Impulsa IT Solutions,Web Host
+ims.net.co,IMS,ISP
+imsbiz.com,Hong Kong Telecommunications (HKT),ISP
+incontact.com,NICE CX,SaaS
+indemed.com,Cardinal Health at-home (Formerly Independence Medical),Healthcare
+indiana.edu,Indiana University Bloomington,Education
+indytel.com,Independence Light & Power Telecommunications,ISP
+ineedbob.com,Computer Solutions,MSP
+inet.vn,INET,Web Host
+infinivan.com,InfiniVAN,ISP
+infolink.ru,Infolink,ISP
+infomaniak.ch,infomaniak,Web Host
+infor.com,Infor,SaaS
+inforcloudsuite.com,Infor,SaaS
+inkyphishfence.com,INKY,Email Security
+inmotionhosting.com,InMotion Hosting,Web Host
+innline.net,innline,SaaS
+innovasur.com,Innovasur,MSP
+inovalon.com,inovalon,Healthcare
+inspiren.my,Inspiren,Marketing
+instantprint.com,Instant Print Corp,Print
+integra.net.au,integra,MSP
+intellisurvey.com,InteliSurvey,SaaS
+inter.net.th,Internet Thailand Company Limited,ISP
+interhost.it,Genesys Informatica Srl,MSP
+intermetalsa.co.mz,Intermetal,Construction
+internet-webhosting.com,iWHOST,Web Host
+internetmailserver.net,Internet Mail Server Networks,Email Provider
+investinmiddlesex.ca,"Middlesex County, Canada",Government
+inxserver.de,Inxmail,Marketing
+ionblade.com,IonBLADE,Web Host
+ip-15-235-216.net,OVH,Web Host
+ip-5-196-151.eu,OVH,Web Host
+ip-51-195-53.eu,OVH,Web Host
+ip-51-254-53.eu,OVH,Web Host
+ip-51-77-42.eu,OVH,Web Host
+ip-51-83-140.eu,OVH,Web Host
+ip-51-89-240.eu,OVH,Web Host
+ip-87-98-138.eu,OVH,Web Host
+ip-92-204-129.us,OVH,Web Host
+ip-92-204-134.us,OVH,Web Host
+iphmx.com,Cisco Cloud Email Security (CES),Email Security
+iphotel.net.br,IPHOTEL Hosped,Web Host
+iphouse.net,Sandwich,Web Host
+ipost.com,iPost,Marketing
+iqcomputing.net,IQComputing,Web Host
+iqhive.com,IQ Hive,MSP
+ironwoodcrc.com,Ironwood Cancer & Research Centers,Healthcare
+is74.ru,Intersvyaz,ISP
+ispgateway.de,domainfactory GmbH,Web Host
+isplevel.pro,ISPLevel,Web Host
+ispn.net,ISPN,MSP
+ispnet.us,ISPnet.us,Web Host
+ispserver.com,ISPServer,Web Host
+issp.at,issp,Web Host
+issr.ru,Mobile TeleSystems,ISP
+istitutotumori.mi.it,Istituto Nazionale dei Tumori,Healthcare
+isync.io,iSync.io,SaaS
+italiaonline.it,Italiaonline,Web Host
+iti-e.co.jp,ITI,Healthcare
+itmedia.co.jp,ITmedia,News
+itscom.net,iTSCOM,ISP
+iuhw.ac.jp,International University of Health and Welfare,Education
+iwashiya-nagai.co.jp,Iwashiya Nagai Co,Healthcare
+jabatus.fr,o2switch,Web Host
+jadecom.or.jp,Japan Association for Development of Community Medicine,Healthcare
+jamescitycountyva.gov,"James City County, Virginia",Government
+javvara.com,javvara,Marketing
+jccm.es,Junta de Comunidades de Castilla-La Mancha,Government
+jellyfish.systems,Namecheap,Email Security
+jikei.ac.jp,The Jikei University,Education
+jinr.ru,Joint Institute for Nuclear Research,Science
+jma-c.jp,Japan Medical Alliance Corporation,Healthcare
+johnshopkins.edu,Johns Hopkins University,Education
+joker-forward.com,Joker.com,Email Provider
+justwebtelecom.com.br,JustWeb,ISP
+jweiland12.net,domainfactory GmbH,Web Host
+jwtech.co.th,JW TECH,Industrial
+kagoya.net,KAGOYA,Web Host
+kalittacharters.com,Kalitta Charters,Logistics
+kanazawa-u.ac.jp,Kanazawa University,Education
+kansas.net,KansasNwt,MSP
+kaspr-privacy.io,Kaspr,Marketing
+kcell.kz,Kcell,ISP
+kchnet.or.jp,Kurashiki Central Hospital (KCH),Healthcare
+kcn.ne.jp,KCN,ISP
+kcom.com,KCOM,ISP
+kddi.ne.jp,KIDDI,ISP
+keio.ac.jp,Keio University,Education
+keio.jp,Keio University,Education
+kendall.cz,GPS Praha,Healthcare
+kennesawtrans.com,Kennesaw Transportation,Logistics
+keralavisionisp.com,Keralavision Broadband,ISP
+keycorpgroup.com,KeyCorp Financial,Finance
+keymail.com,KeyMail,Email Provider
+kforce.com,Kforce,Staffing
+kilmarnock.ca,Kilmarnock Enterprise,Industrial
+kindlebio.com,Kindle Bioscinces,Healthcare
+king-good.com,Jinku Group,Industrial
+kingswoodfacadesthailand.com,Kingswood Facades Thailand,Industrial
+kirkbrothers.com,Kirk Brothers Supercenter,Automotive
+kitano-hp.or.jp,Kitano Hospital,Healthcare
+klinik-arlesheim.ch,Klinik Aresheim,Healthcare
+kmtn.ru,Kostrom City Telephone Network,ISP
+kmu.ac.jp,Kansai Medical University,Education
+knet.kg,Kyrgyztelecom,ISP
+kobe-u.ac.jp,Kobe University,Education
+kodiaksys.com,ARIOS,SaaS
+kolsitegroup.com,Kolsite Group,Industrial
+konicaminolta.us,Konica Minolta,Technology
+koumbit.net,Koumbit.org,MSP
+kovacmed.com,KOVAC-MED,Healthcare
+kpn.net,KPN,ISP
+kpu-m.ac.jp,Kyoto Prefectural University of Medicine,Education
+kreativemachinez.tech,Kreative Machinez,Marketing
+kryptronic.com,Kryptronic,SaaS
+ktc.kz,KTC Kazakhstan LLP,Industrial
+ktis.net,Kingdom Networks,ISP
+ktk-sol.co.jp,KtK Solutions,Email Security
+ktnet.kg,Кыргызтелеком,ISP
+kundenserver.de,domainfactory GmbH,Web Host
+kyoto-u.ac.jp,Kyoto University,Education
+l3harris.com,L3Harris,Defense
+laboratoires-thea.fr,Laboratoires Théa,Healthcare
+larkinhospital.com,Larkin Health System,Healthcare
+larrycomputerguy.com,Larry The Computer Guy,MSP
+lauruslabs.com,Lasarus Labs,Healthcare
+lawtendo.com,Lawtendo,Legal
+lb.go.gov.br,Government of Goias State Brasil,Government
+lcmh.com,Lake Charles Memorial Health System,Healthcare
+learningstream.com,Learning Stream,SaaS
+leftor.ba,Leftor,Web Host
+legenditsolutions.com,Legend IT Solutions,Web Host
+lestetelecom.com.br,Leste,ISP
+lghealth.org,Penn Medicine Lancaster General Health,Healthcare
+liberation.fr,Liberation,News
+ligataxi.com,LiguaTaxi,SaaS
+ligmais.com.br,Lig+Telecom,ISP
+liguriadigitale.it,Liguria Digitale,MSP
+likuid.com,Likuid,Web Host
+lindsaymunicipalhospital.com,Lindsay Municipal Hospital,Healthcare
+linejet.net.br,LineJet,ISP
+link3.net,Link3 Technologies,ISP
+linkedin.com,LinkedIn,Social Media
+linode.com,Linode,Web Host
+linqtelecom.com.br,LinQ Telecom,ISP
+liquidtelecom.net,Liquid Intelligent Technologies,ISP
+live-servers.net,Fasthosts Internet Ltd,Web Host
+livedo.jp,Livedo Corporation,Healthcare
+livemail.co.uk,Fasthosts Internet Ltd,Web Host
+livenation.com,Live Nation,Entertainment
+llumc.edu,Loma Linda University Medical Center,Healthcare
+lmi.net,LMi.net,ISP
+locaweb.com.br,Locaweb,Web Host
+lodestonegroup.com,Loadstone Insurance,Insurance
+loftsinc.com,"Lofts, Inc.",Retail
+logisticintegrators.com,Logistics Integrators,Logistics
+logix.in,Logix InfoSecurity,MSP
+lolipop.jp,Lolipop,Web Host
+loopia.se,Loopia,Web Host
+lowesthosting.com,Lowest Hosting,Web Host
+lpn.co.th,L.P.N. Development PCL,Real Estate
+lstn.net,Limestone Networks,Web Host
+lubonet.net.pl,LUBONET,ISP
+luxsci.com,LuxSci,Email Security
+lxcluster.at,LXCluster,Web Host
+lytehosting.com,Lyte Hosting,Web Host
+m9network.com,Volico Data Centers,Web Host
+macrx.com,MAC Rx,Healthcare
+maersk.com,Maersk,Logistics
+maestroit.com,Maestro IT Services,MSP
+magnoliarental.com,Magnolia Rental,Retail
+mail.com,Mail.com,Email Provider
+mail.mil,Mail.mil,Government
+mail.ru,Mail.ru,Email Provider
+mail2world.com,Mail2World,Email Provider
+mailbaby.net,Mail Baby,Email Security
+mailchannels.net,MailChannels,Web Host
+mailcloud.com.tw,MailCloud,Email Provider
+mailcontrol.com,Forcepoint,Email Security
+mailgun.info,Mailgun,SaaS
+mailgun.net,Mailgun,SaaS
+mailgun.us,Mailgun,SaaS
+mailhop.org,DuoCircle,Email Security
+mailhostbox.com,Unified Layer,Web Host
+mailin.fr,Sendinblue,SaaS
+mailinblack.com,Mailinblack,Email Security
+mailjet.com,Mailjet,Marketing
+mailmerc.com,MAILNERC,Email Security
+mailnara.co.kr,Mailnara,Web Host
+mailplug.co.kr,Mailplug,Email Provider
+mailplug.com,Mailplug,Email Provider
+mailprotect.be,Combell,Web Host
+mailroute.net,MailRoute,Email Security
+mailsecure.jp,NTTPC Communications,Email Security
+mailspamprotection.com,SiteGround,Web Host
+mailwip.com,Mailwip,Email Provider
+majorcore.com,MajorCore,Web Host
+makeshop.jp,makeshop,SaaS
+maletazul.pt,Maletazul,MSP
+mamacheaps.com,Mama Cheaps,Retail
+managedns.org,IBM Cloud,IaaS
+mandrillapp.com,Mailchimp Transactional,SaaS
+mappsoluciones.com,MappS Soluciones,Web Host
+mark-itt.net,Point Internet,ISP
+mark-net.co.jp,Mark Co,Marketing
+marriott-service.com,Marriott,Travel
+mars-inc.com,Mars,Food
+maruyamakai.or.jp,Maruyamakai,Healthcare
+masterhost.ru,Master Host,Web Host
+mastertrg.ru,МастерМебель,Retail
+materprivate.ie,Mater Private Network,Healthcare
+matrixglobal.net.id,Matrixnet,ISP
+maxaninteirorsystems.com,Maxan Interior Systems,Industrial
+maximtech.com,Maximtech,Web Host
+maximweb.com,Maxim Management Services,Healthcare
+maxnet.ua,Maxnet,ISP
+mccooknet.com,McCookNet,Web Host
+mcdlv.net,Intuit Mailchimp,Marketing
+mcdougallauction.com,McDougall Auctioneers,Industrial
+mchsi.com,MediacomCable,ISP
+mcmaster.com,McMaster-Crr,Manufacturing
+mcsv.net,Intuit Mailchimp,Marketing
+mdcc.gob.pe,Municipalidad Distrital de Cerro Colorado,Government
+mdlsx.ca,"Middlesex County, Canada",Government
+me.com,Apple iCloud,Email Provider
+medi-take.jp,Medi-Take,Healthcare
+media3.us,Media3,MSP
+mediaticanet.it,Mediatica,Web Host
+medimpact.com,MedImpact,Healthcare
+meditake.jp,Medi-Take,Healthcare
+medline.com,Medline,Healthcare
+mega.kg,Maga-Line,ISP
+megacom.kg,MegaCom,ISP
+megalink.net.ru,Мегалинк,ISP
+megamailservers.com,MegaMailServers,MSP
+menlosecurity.com,Menlo Security,Email Security
+mercranet.com,Mercranet,Web Host
+mercurygate.net,MercuryGate,SaaS
+meric.net.tr,Meriç Hosting,Web Host
+merula.net,Merula,ISP
+messagelabs.com,Symantec Email Security,Email Security
+messagingengine.com,Fastmail,Email Provider
+mesvr.com,ReadNotify,Email Provider
+metfone.com.kh,Metfone,ISP
+metricsthatmatter.com,Metrics That Matter,SaaS
+metrocomm.com,Metro Communications,ISP
+metronetinc.net,Metronet,ISP
+mgsm.ru,Aviasales,Travel
+mho.de,Marienhospital Osnabrück,Healthcare
+mhos.de,Marienhospital Osnabrück,Healthcare
+mia.net,HostDrive,Web Host
+miamioh.edu,Miami University,Education
+microfocus-japan.com,Micro Focus,MSP
+microsoft.com,Microsoft,Technology
+middlesex.ca,"Middlesex County, Canada",Government
+midi-loisirs.com,Midi Loisirs,Entertainment
+migadu.com,Migadu,Email Provider
+milkcratesdirect.com,FARMPLAST,Retail
+milleni.com.tr,Millenicom,ISP
+mimecast.com,Mimecast,Email Security
+minigraphics.net,Mini Graphics,Print
+mirohost.net,MiroHost,Web Host
+mistral.co.uk,Nasstar,MSP
+mistral.net,Nasstar,MSP
+mit.edu,MIT,Education
+mivamerchant.net,Mirva,SaaS
+mknetwork.com.br,MkK Network Telecom,ISP
+mktdns.com,Marketo,Marketing
+mktomail.com,Marketo,Marketing
+mlec.com,Meriwether Lewis Electric Cooperative,ISP
+mlems.ca,Middlesex-London Paramedic Service,Healthcare
+mlps.ca,Middlesex-London Paramedic Service,Healthcare
+mmm.com,3M,Technology
+mmrs.jp,Mirai Communication Network Inc.,Web Host
+mni.net,MNI,Marketing
+mobilecountypublicworks.net,Mobile County Public Works,Government
+modeldrug.com,Model Health Care,Healthcare
+modenesegastone.com,Modenese Gastone,Retail
+mojohost.com,MojoHost,Web Host
+molalla.net,Molalla Communications,ISP
+monatglobal.com,MONAT Global,Beauty
+moniker.com,Moniker,Web Host
+moovik.com.ua,MooVik,Retail
+morganstanleysmithbarney.com,Morgan Stanley Smith Barney,Finance
+mostobene.com,Mostobene,Healthcare
+mounet.com,MouNet,ISP
+movitel.co.mz,Movitel,ISP
+mrhost.biz,MrHost,Web Host
+mserwis.pl,MSERWIS,Web Host
+msgexch.com,Constant Contact,Marketing
+mtaroutes.com,N-able,Email Security
+mtasv.net,Postmark,SaaS
+mtdtraining.co.uk,MTD Training Group,SaaS
+mtnl.net.in,MTNL,ISP
+mts.ru,MTS,ISP
+mtsnet.ru,Mobile TeleSystems PJSC (MTS),ISP
+mtsvc.net,GoDaddy,Web Host
+mtu-net.ru,Mobile TeleSystems,ISP
+mundivox.com,Mundivox Communications,ISP
+musashi-eng.co.jp,Musashi Engineering,Manufacturing
+mwprem.net,NTT,ISP
+mx.net,Silversky,Email Security
+mxncommerce.com,MXN Commerce Group,SaaS
+mxrecord.io,Area 1 Email Security,Email Security
+mxrecord.mx,Area 1 Email Security,Email Security
+mxroute.com,MXroute,Email Provider
+mxs.au,Synergy Wholesale,Web Host
+my-tss.com,Performive,MSP
+myaccess.ca,Access Communications,ISP
+mydsomanager.com,My DSO Manager,SaaS
+myfairpoint.net,Consolidated Communications,ISP
+myfleetvehicle.com,ATS Processing Services,Finance
+mygoto.com,MyGoto Brands,Web Host
+myhosting.com,MyHosting,Web Host
+mylinkline.com,MyLinkLine,SaaS
+mymailcheap.com,Mailcheap,Email Provider
+mymailhosting.com,Doteasy,Web Host
+mymanga.co.ke,Mymanga Networks,ISP
+mymts.net,Bell MTS,ISP
+myregisteredsite.com,web.com,Web Host
+mysecurecloudhost.com,World Host Group,Web Host
+mysecuritas.com,Securitas,Physical Security
+mywhc.ca,Web Hosting Canada,Web Host
+myworkday.com,Workday,SaaS
+nagoya-cu.ac.jp,Nagoya City University,Education
+nagoya-u.ac.jp,Nagoya University,Education
+nahealth.com,Northern Arizona Healthcare,Healthcare
+name.com,Name.com,Web Host
+nameserver.sk,Webglobe,Web Host
+namespro.ca,Namespro,Web Host
+nano.uz,Nano Telecom,ISP
+nascoeducation.com,Nasco EDucation,Education
+nationalhha.com,National Home Health,Healthcare
+navayuga.com,Navayuga,Industrial
+naviexp.jp,NaviExp,MSP
+nbcb.cn,Bank of Ningbo,Finance
+nctc.com,NCTC,ISP
+nearlyfreespeech.net,NearlyFreeSpeach.NET,Web Host
+needles.co.kr,Tae Chang Industrial,Healthcare
+neoclan.net.mx,Neoclan Networks,ISP
+neovision.de,NEOVISION,Marketing
+nephronpharm.com,Nephon,Healthcare
+net-uno.net,Net Uno,ISP
+netage.jp,NETAGE,ISP
+netcabo.pt,NOS,ISP
+netcore.co.in,Netcore,Marketing
+netdesignhost.com,Netdesign Group,Web Host
+netfinn.net,netFinn,Web Host
+nethosting.com,NetHosting,Web Host
+netmds.com,Net Doctors,MSP
+netpagedns.net,Netpage Internet Services,ISP
+netrevolution.com,NetRevolution,ISP
+netroad.ru,Mobile TeleSystems,ISP
+netsolus.com,netsolus KC,MSP
+netsville.com,Netsville,Marketing
+netsystemtelecom.net.br,NetSystem FibraTelecom,ISP
+nettlinx.com,Nelinx,ISP
+nettoday.co.th,Net Today,Web Host
+netventure.pl,Netventure,MSP
+netvigator.com,HKT,ISP
+network80.com,Network80,Web Host
+neuca.pl,NECUA Group,Healthcare
+new-life.com,New Life,Retail
+newpages.com.my,NEWPAGES,Retail
+newsmanapp.com,NewsMAN,Marketing
+newsunseo.com,NewSunSEO,Marketing
+newtekwebhosting.com,Newtek Technology Solutions,Web Host
+nexcess.net,Nexcess,Web Host
+nexicom.net,Nexicom,ISP
+next-gen.ro,NextGen,ISP
+ngpweb.com,Bonterra,Marketing
+nhisac.org,H-ISAC,Healthcare
+nhs.net,NHSmail,MSP
+nicmail.ru,RU-CENTER,Email Provider
+nifty.com,@nifty,Web Host
+niigata-u.ac.jp,Niigata University,Education
+nititancommercial.com,Niti Tan Commercial,Industrial
+nocdirect.com,JaguarPC,Web Host
+nolegia.net,Nolegia,Web Host
+nordnet.fr,Nordnet,ISP
+nordstrom.com,Nordstrom,Retail
+northwestern.edu,Northwestern University,Education
+nos.pt,NOS,ISP
+novotelecom.ru,Novo Telcom,ISP
+noxlink.com.br,NoxLink,ISP
+npcma.ru,Nizhnekamsk Enterprise,Industrial
+nrtmexico.mx,Corporativo Núcleo Radio Televisión,News
+nsmailserv.com,Netcore,Marketing
+ntirety.com,Ntirety,MSP
+ntt.com,NTT Communications,ISP
+nttdocomo.co.jp,NTT DOCMO,ISP
+nuveramail.net,Nuvera,Email Provider
+nw027.com,Poppulo (Formerly Newsweaver),SaaS
+nxcli.net,Liquid Web,Web Host
+nycm.com,NYCM Insurance,Finance
+o-mx.com,Omedia,Marketing
+o2.cz,O2,ISP
+obird.ca,obid.ca,MSP
+obit.kz,OBIT,ISP
+oboi1.ru,Oboi no1,Retail
+occtoplus.com.br,Occtoplus,SaaS
+oceanviewfunding.com,Ocean View Funding,Finance
+ocn.ad.jp,NTT,ISP
+ocn.ne.jp,OCN,ISP
+octacom.ca,Octacom,MSP
+odoo.com,Odoo,SaaS
+odu.edu,Ohio Dominican University,Education
+ohio.edu,Ohio University,Education
+okanagan.net,Okanagan.net,Web Host
+okayama-u.ac.jp,Okayama University,Education
+okta.com,Okta,SaaS
+oleane.fr,Oleane,ISP
+omeda.com,Omedia,Marketing
+omninet.co.nz,OmniNet,ISP
+omnis.com,Omnis,Web Host
+onamae.ne.jp,GMO Internet,Web Host
+ondal.com,Ondal Medical Systems,Healthcare
+one-email.co.th,One Email,Email Provider
+one-mail.on.ca,eHealth Ontario,Healthcare
+one.com,One.com,Web Host
+one.th,One Platform,Email Provider
+onec1.com,C1,MSP
+onecallnow.com,One Call Now,SaaS
+onedaysign.com,One Day Signs,Retail
+oneoffice.jp,OneOffice,SaaS
+onice.io,IceWrap,Email Provider
+online.kz,Kazakhtelecom,ISP
+online.net,Scaleway,Email Provider
+online.tj.cn,China Unicom,ISP
+ono.com,Vodafone Ono,ISP
+ontarioshores.ca,Ontario Shores Centre for Mental Health,Healthcare
+ontash.com,Ontash & Ermac,Industrial
+onvif.org,Onvif,Technology
+ooma.com,Ooma,ISP
+openair.com,Oracle NetSuite OpenAir,SaaS
+opentext.com,OpenText,SaaS
+openwave.ai,Openwave Messaging,Email Provider
+optimus.si,Optimus IT d.o.o.,MSP
+optipub.com,OptiPub,Publishing
+optonline.net,Optimum,ISP
+orange-business.com,Orange Business,ISP
+orange.es,Orange,ISP
+orange.fr,Orange,Email Provider
+orange.net.il,Orange,ISP
+orangecustomers.net,Orange,ISP
+orbital.net,Orbital Net,ISP
+oregonstate.edu,Oregon State University,Education
+ori.net,ORI,ISP
+orionnet.ru,Orion Telecom,ISP
+orthodoxws.com,Orthodox Web Solutions,Web Host
+oser.com,Oser Comunications Group,Marketing
+osir.net.br,Osirnet,ISP
+osu.edu,The Ohio State University,Education
+otelco.net,GoNetSpeed,ISP
+otenet.gr,Cosmote,ISP
+ottcmail.com,Ontario & Trumansburg Telephone Companies,ISP
+outboundrelay.com,ForwardMX,SaaS
+outlook.cn,Outlook (China),Email Provider
+outlook.com,Outlook (Personal and Microsoft 365),Email Provider
+ovh.ca,OVH,Web Host
+ovh.net,OVH,Web Host
+ovh.us,OVH,Web Host
+ownit.se,Ownit,ISP
+owt.com,One World Telecommunications,ISP
+ox.ac.uk,Education of Oxford,Education
+oxsus-vadesecure.net,Scaleway,Web Host
+pair.com,Pair Networks,Web Host
+pairdomains.net,Pair Domains,Web Host
+pairvps.com,Pair Networks,Web Host
+paket78.ru,Пакет Пакетов,Industrial
+palette-up.jp,Palette UP,Web Host
+panelvps.net,PanelBox,Web Host
+panola.com,Complete Computers,MSP
+paragould.net,Paragould Municipal Utilities,ISP
+parkerinstitute.org,Parker Jewish Institute for Healthcare & Rehabilitation,Healthcare
+parsleysage.net,.ParsleySage Guest House,Travel
+paubox.com,Paubox,Email Security
+pbiaas.com,INOS,Web Host
+pd25.com,Salesforce Marketing Cloud (Formerly Pardot),Marketing
+peaknet.net,PeakNet,Industrial
+pearcebevill.com,"Pearce, Bevill, Leesburg, Moore, P.C.",Finance
+peopleanswers.com,Infor,SaaS
+pepitrans01.com,Netcore (Formerly Pepipost),SaaS
+pepitrans02.com,Netcore (Formerly Pepipost),SaaS
+perception-point.io,Perception Point,Email Security
+perenso.com,Perenso,Marketing
+perfora.net,IONOS,Web Host
+perimeterwatch.com,PerimeterWatch,MSSP
+petroed.com,PetroEd,Education
+pfmsys.com,Professional Flight Management (PFM),Logistics
+pgcps.org,Prince George's County Public Schools,Education
+piedmonteye.com,Piedmont Eye Center,Healthcare
+pif.co.uk,Pinnacle Freight,Logistics
+pipefy.com,Pipefy Inc,SaaS
+plala.or.jp,Plala,ISP
+planety.com.br,Planety Internet,ISP
+platform.sh,Platform.sh,PaaS
+play-internet.pl,Play,ISP
+playbackmail.com,PlayBackMail,Email Provider
+pldi.net,Pioneer Cellular,ISP
+pldt.net,PLDT,ISP
+plis.net.br,Plis Telecom,ISP
+plus.net,plusnet,ISP
+plus.pl,Plus,ISP
+pmweb.com.br,pmweb,Marketing
+pobox.com,Pobox,Email Provider
+pol-online.com,Bangladesh Online,ISP
+pol.ir,ParsOnline,ISP
+poneytelecom.eu,Pony Telecom,Web Host
+porkbun.com,porkbun.com,ISP
+portative.net,Portative Technologies,ISP
+postcodesoftware.co.uk,Postcode Software,SaaS
+ppe-hosted.com,Proofpoint Essentials,Email Security
+pphosted.com,Proofpoint,Email Security
+prchost.com,PRC Hosting,Web Host
+prempub.com,Premier Publishing,Marketing
+princeton.edu,Princeton University,Education
+principal-it.com,Principal IT,MSP
+privateemail.com,PrivateEmail.com,Email Provider
+privatelabeldns.com,TurnKey Internet,Web Host
+privatelayer.com,Private Layer,Web Host
+privatesystems.net,PrivateSystems.net,Web Host
+prnewswire.com,PR Newswire,Marketing
+procopa.dk,Procopa IT,MSP
+profitserver.ru,Profitserver,Web Host
+prontomarketing.com,Pronto Marketing,Marketing
+proofhubmail.com,ProofHub,SaaS
+prosites.com,ProSites,Web Host
+proton.ch,Proton,Email Provider
+proton.me,Proton,Email Provider
+protonmail.ch,Proton,Email Provider
+provedornetcenter.com.br,Netcenter,ISP
+proventainternational.com,Proventa International,Healthcare
+prudential.com.sg,Prudential Singapore,Finance
+prudentpublishing.com,Prudent Publishing,Retail
+prw.net,Puerto Rico Webmasters,Web Host
+pserver.space,Profitserver,Web Host
+psychz.net,Psychz Networks,Web Host
+ptd.net,PTD,ISP
+ptrcloud.net,GMO GlobalSign,IaaS
+pubnix.net,PubNIX,Web Host
+puc-rio.br,PUC Rio,Education
+pucminas.br,PUC Minas,Education
+pucp.edu.pe,Pontificia Universidad Católica del Perú,Education
+pulkco.com,Pulk & Co,ISP
+pulsetv.com,Pulse TV,Retail
+purdue.edu,Purdue University,Education
+pwuhui.com.tw,Perfect Medical,Healthcare
+qemailserver.com,Qualtrics,SaaS
+qindiafund.com,Q India Fund,Finance
+qlix.com.br,Qlix,Web Host
+qq.com,QQ,Email Provider
+qrc.ca,Quality Respiratory Care,Healthcare
+qth.com,QTH.com,Web Host
+quadax.com,Quadax,Healthcare
+quadranet.com,Quadranet,Web Host
+questforum.org,Telecommunications Industry Association,Industrial
+quitmancountyms.org,"Quitman County, Mississippi",Government
+quotevalet.com,QuoteValet,SaaS
+qvidian.com,Qvidian,SaaS
+qwest.net,Quest Communications,ISP
+r3zo.net,R3ZO,Web Host
+rack400.com,Rack400,Web Host
+racknation.cr,RsckNation,Web Host
+rackspace.com,Rackspace,Web Host
+radarinternet.com.br,Radar Internet,ISP
+radiantsolutions.net,Radient Solutions,Web Host
+rafftechnologies.com,Raff Technologies,Web Host
+raiolanetworks.com,Raiola Networks,Web Host
+raleighortho.com,Raleigh Orthopaedic,Healthcare
+ramsaysante.fr,Ramsay Santé,Healthcare
+raycdjr.com,Ray Chrysler Dodge Jeep RAM,Automotive
+rcil.gov.in,RailTel,ISP
+rcn.com,RCN,ISP
+rdp.sh,RDP.sh,SaaS
+redbird.net,NexGenAccess (Formerly Redbird),ISP
+redcotel.bo,Cotel Ltda.,ISP
+redesiminternet.com.br,Sim Fibra,ISP
+redetuxnet.com.br,Tuxnet,ISP
+redexpertos.com,RedExpertos,Web Host
+rediffmailpro.com,Rediffmail Pro,Email Provider
+redirection.net,Redirectionet,Web Host
+reef-guardian.com,Reef Guardian,Education
+reg.ru,Reg.ru,Web Host
+reg365.net,register365,Web Host
+regentbranding.co.uk,Regent Branding,Marketing
+regiomed-kliniken.de,REGIOMED-KLINIKEN GmbH,Healthcare
+register.it,Register.it,Web Host
+registeredsite.com,Web.com,Web Host
+registrar-servers.com,Namecheap,Web Host
+regusnet.com,Regus,Real estate
+regxa.com,Regxa Cloud,Web Host
+relativity.one,RelativityOne,SaaS
+relod.ru,RELOD,Retail
+rheamedical.org,Rhea Medical Center,ISP
+rhein-it.de,RHEN IT,MSP
+riberasaludmail.com,Ribera Salud,Healthcare
+rightnowtech.com,Oracle Service Cloud,SaaS
+rima-tde.net,"TELEFONICA, S.A.",ISP
+riskonnectclearsight.com,Riskonnect ClearSight,SaaS
+rit.edu,Rochester Institute of Technology,Education
+ritternet.com,Ritter Communications,ISP
+rmx.de,Retarus GmbH,SaaS
+roche.com,Roche,Healthcare
+rogers.com,Rogers,ISP
+rootlayer.net,RootLayer LTD.,Web Host
+rotundasoftware.com,Rotunda Software,MSP
+rsa.com,RSA,Technology
+rsgsv.net,Intuit Mailchimp,Marketing
+rt.ru,RT,Government Media
+runbox.com,Runbox,Email Provider
+rusonyx.ru,Rysonyx Cloud,Web Host
+rutgers.edu,Rutgers University,Education
+rwas.co.uk,Royal Welsh Agricultural Society,Agriculture
+rzone.de,Strato AG,Web Host
+sabyrconsulting.com,Sabyr Consulting,MSP
+safari-productions.com,Safari Productions,Event Planning
+safaricombusiness.co.ke,Safaricom,ISP
+safewebservices.com,NMI,SaaS
+saimanet.kg,Saima Telecom,ISP
+sakura.ne.jp,SAKURA Internet,ISP
+salesforce.com,Salesforce,SaaS
+samanage.com,SolarWinds Service Desk,SaaS
+samil-pharm.com,Samil,Healthcare
+samtel.ru,Samtelecom,ISP
+sandrix.com,Sandrix Technologies,MSP
+santehealth.net,Sante Health System,Healthcare
+saplbd.com,Summit Alliance Port,Logistics
+sapmed.ac.jp,Sapporo Medical University,Healthcare
+sarkor.uz,Sarkor,ISP
+sbcglobal.net,AT&T,ISP
+scaledsystems.com,SimpleNet,Web Host
+scatair.com,Scatair,Manufacturing
+schmc.ac.kr,Soon Chun Hyang University Medical Center,Healthcare
+scorm.com,SCORM,SaaS
+sdldelivery.com,Specialty Delivery & Logistics,Logistics
+sealbond.co.jp,Nippon Sealbond,Manufacturing
+seaspraymta1.com,Cox Communications,ISP
+seaspraymta2.com,Cox Communications,ISP
+secomtrust.net,SECOM Trust Systems,MSP
+sectormail.net,Sectorlink,Web Host
+secure-mailgate.com,Secure Mailgate,Email Provider
+secure-mails.com,Tata Communications,SaaS
+secure.jp,KIDDI Web Communications (CPI),Web Host
+secure.ne.jp,KIDDI,ISP
+securednshost.com,IPS Inc.,Web Host
+securemailserver.ca,securemailserver.ca,Email Provider
+securemx.jp,IIJ SecureMX,Email Security
+securence.com,Securence,Email Security
+secureserver.net,GoDaddy,Web Host
+seed.net.tw,Seednet,ISP
+selligent.com,Selligent,Marketing
+sendcloud.io,Sebdcloud,SaaS
+sendcloud.org,Aurora SendCloud,SaaS
+sendgrid.net,Twilio SendGrid,Marketing
+sendio.com,Sendio,Email Security
+sendnode.com,MAILINGWORK,Marketing
+sendoso.com,Sendoso,Marketing
+sensaphone.com,Sensaphone,SaaS
+sentara.com,Sentara,Healthcare
+seqtek.net,SEQTEK,MSP
+servconfig.com,InMotion Hosting,Web Host
+serverdata.net,GoDaddy,Web Host
+serverhost.net,Server Host,Web Host
+serverhs.org,WebHS,Web Host
+serverneubox.com.mx,Neubox,Web Host
+serveroffer.net,Serveroffer,Webhost
+serverpanel.com,Shock Hosting,Web Host
+service-now.com,ServiceNow,SaaS
+servicehoster.ch,Green,Web Host
+servicemail24.de,Arvato Systems,MSP
+servicesennuage.ca,CDT Connexion,MSP
+servidorcostarica.com,HostDime,Web Host
+servidoresdns.net,Arsys,Web Host
+ses-stiftung.de,Schwester Euthymia Stiftung,Healthcare
+sevtelecom.ru,Servastopol Telecom,ISP
+sfr.fr,SFR,ISP
+shamrog.com,Shamrog,Web Host
+shared-server.net,GMO Cloud,Web Host
+shatel.ir,Shatel,ISP
+sheffieldpharma.com,Sheffield Pharmaceuticals,Healthcare
+shield.security,Mailprotector,Email Security
+shizuokaseiki.com,Shizuoka Seiki,Industrial
+shmc.jp,Sainokuni Higashiomiya Medical Center,Healthcare
+shoplocalpharmacy.com,Cardinal Health,Healthcare
+showakvc.co.jp,"Showa Kasei Kogyo Co., Ltd.",Industrial
+showpad.com,Showpad,Marketing
+sibyl.com,Sibl Design,MSP
+signal.no,Signal,ISP
+signium.co.jp,Signium,Consulting
+siho.org,Siho Insurance Services,Finance
+simplystamps.com,Simply Stamps,Retail
+simpro.com.br,Simpro,Healthcare
+simus.uz,Simus,ISP
+sinergit.com.do,Sinergit,MSP
+siriustelecom.uz,Sirius Telecom,ISP
+siteprotect.com,SiteMail,Email Provider
+sitios.win,Sitios Win,Web Host
+sixinternet.com.br,Six Internet,ISP
+sjtransindo.com,Sumatera Jaya Transindo,Logistics
+sknt.ru,Skynet,ISP
+skybroadband.com,Sky,ISP
+sl-reverse.com,IBM Cloud,PaaS
+slgnt.eu,Selligent,Marketing
+slgnt.us,Selligent,Marketing
+slic.com,SLIC Network Solutions,ISP
+smartape.ru,Smart Ape LLC,Web Host
+smartone.com,SmarTone,ISP
+smartservers.com.au,Hostopia Australia,Web Host
+smartspb.net,Smart Telecom,ISP
+smtp.com,SMTP.com,SaaS
+smtp.cz,Active24,Web Host
+smtp25.com,Zix,Email Security
+smtp2go.com,SMTP2GO,SaaS
+snapengage.com,SnapEngage,SaaS
+socgen.com,Societe Generale,Finance
+socialfive.com,Social5,Marketing
+socialservices-ssmd.ca,Social Services Sault Ste. Marie,Government
+socket.net,Socket,ISP
+socoolsolution.com,So Cool Solution,MSP
+sodetel.net.lb,sodetel,ISP
+sofreafurnishings.com,Sofrea Furnishings,Retail
+softbank.jp,SoftBank,ISP
+softbank.ne.jp,SoftBank,ISP
+softvideo.ru,СОФТВИДЕО,ISP
+sonichealthcareusa.com,Sonic Healthcare USA,Healthcare
+sophos.com,Sophos,Email Security
+sosnc.gov,North Carolina Secretary of State,Government
+sougo-group.jp,Camcom Group,SaaS
+spaceship.net,Spaceship,Web Host
+spaceweb.ru,SpaceWeb,Web Host
+spamtitan.com,SpamTitan,Email Security
+sparklight.com,Sparklight,ISP
+sparkpostmail.com,SparkPost,Marketing
+spectrum.com,Spectrum,ISP
+speedway.hk,Speedway Travels,Travel
+speedy.com.ar,Movistar (Formerly Speedy),ISP
+speedy.net.pe,Telefonica del Peru,ISP
+speicherzentrum.de,Speicherzentrum,Web Host
+spglobal.com,S&P Global,Finance
+spintheweb.com,Spin The Web,Web Host
+splashtop.com,Splashtop,Technology
+springernature.com,Springer Nature,Education
+srvape.com,Smart Ape LLC,Web Host
+ssdcloudindia.net,E2E Networks,Web Host
+ssnettelecom.net.br,SSNET Telecom,ISP
+sst2u.com,SST2U,Education
+ssuv.uz,"Samarkand Institute of Veterinary Medicine, Animal Husbandry and Biotechnology",Education
+stackmail.com,20i,Web Host
+stanford.edu,Stanford University,Education
+starchapter.com,StarChapter,SaaS
+stargatecommunications.com,X-Link Limited,ISP
+starhealthagency.com,Star Home Health,Healthcare
+starkmans.com,Starkmans Health Care Depot,Healthcare
+starlinx.com,StrLinX,MSP
+state.co.us,The State of Colorado,Government
+state.ma.us,The State of Massachusetts,Government
+state.ms.us,The State of Missouri,Government
+state.or.us,The State of Oregon,Government
+stcable.net,ST Cable,ISP
+stellarllc.net,Gardonville Cooperative Telephone Association,ISP
+stertec.co.jp,KUNIMORI-STAR Group,MSP
+stetnet.com.br,webby agora é alares,ISP
+stewarthowe.com,Newfold Digital,Web Host
+sti.net,Sierra Tel,ISP
+stjansdal.nl,Hospital St Jansdal,Healthcare
+stokes.nc.us,"Stokes County, North Carolina",Government
+stomabags.com,Stomabags.com,Healthcare
+stonybrook.edu,Stonybrook University,Education
+strategictreasurer.com,Strategic Treasurer,Finance
+stratoserver.net,STRATO,Web Host
+succeed.net,Succeed.net,ISP
+superb.net,CherryRoad (Formerly Superb Internet),Web Host
+supercp.com,a2 hosting,Web Host
+supernetes.tv.br,Supernet,ISP
+superonline.net,Turkcell Superonline,ISP
+supportedns.com,MDD Hosting,Web Host
+sura.ru,Rostelecom,ISP
+sureserver.com,SureSupport LLC,Web Host
+swiftslots.com,SwiftSlots,Web Host
+swishmail.com,Swishmail,MSP
+swisscenter.com,SwissCenter,Web Host
+swisscom.ch,Swisscom,ISP
+syn-alias.com,Synacor,SaaS
+synccentric.com,Synccentric,SaaS
+synchronoss.net,Synchronoss,SaaS
+synthite.co.uk,Synthite,Industrial
+sysaidit.com,SysAid,SaaS
+sysnet.ie,VikingCloud,MSP
+t-ipconnect.de,Deutsche Telekom,ISP
+tachc.org,Texas Association of Community Health Centers (TACHC),Healthcare
+takeda.com,Takeda,Healthcare
+takethemameal.com,Take Them A Meal,SaaS
+tami.pl,TAMI,MSP
+tanglewoodhealth.com,Tanglewood Medical Supplies,Healthcare
+tanomail.com,Tanomail,Retail
+tanzaniaservers.com,Tanzania Servers,Web Host
+tctwest.net,TCT,ISP
+tds.net,TDS,ISP
+teche.net,Uniti,MSP
+teksavvy.com,TekSavvy,ISP
+telebecinternet.com,Telebec,ISP
+telecentro-reversos.com.ar,Telecentro,ISP
+telecom.kz,Kazakhtelecom,ISP
+telecom.net.ar,Telecom Argentina,ISP
+telecomitalia.it,TIM,ISP
+telecomprovider.com.br,Telecom Provider,ISP
+telefonica.de,Telefónica Germany,ISP
+telekom.rs,MTS,ISP
+telenet-ops.be,Telenet BV,ISP
+telenet.be,Telenet,ISP
+telepac.pt,SAPO,Email Provider
+telepacific.net,TPx Communications,ISP
+teleson.net.br,Teleson Telecom,ISP
+telkomsa.net,Telkom,ISP
+tellas.gr,Nova Telecommunications,ISP
+telmex.net.ar,Telmex Argentina,ISP
+telstra.net,Telstra,ISP
+telus.net,TELUS,ISP
+tenders.net,Tenders.net,SaaS
+teol.net,mtel,ISP
+tera-byte.com,Tera-Byte,Web Host
+terra.com,Terra Networks,Web Host
+terra.com.br,Terra Mail,Email Provider
+tevapharm.com,Teva Pharmaceuticals,Healthcare
+texas.gov,The Government of Texas,Government
+tfn.net.tw,Taiwan Fixed Network,ISP
+thcservers.com,THCServers,Web Host
+thechristhospital.com,The Christ Hospital,Healthcare
+thegameshowcompany.ca,The Game Show Company,Entertainment
+thehostgroup.com,The Host Group,Web Host
+thomsonreuters.com,Thomson Reuters,SaaS
+tical.com,Grupo Tical,Logistics
+ticketor.com,Ticketor,Entertainment
+tidewater.net,Tidewater Telecom,ISP
+tie.cl,Telefónica Internet Empresas S.A.,ISP
+tigerconnect.com,TigerConnect,SaaS
+tigertech.net,Tiger Technologies,Web Host
+tigo.com.co,Tigo Columbia,ISP
+tim.it,TIM,ISP
+timeetc.com,Time Etc,SaaS
+timeweb.ru,Timeweb,Web Host
+tisco.mx,TISCO Networks,MSP
+titan.email,Titan,Email Provider
+titanhq.com,TitanHQ,Email Security
+tix.it,Tuscany Internet eXchange,ISP
+tkreal.ru,The Real Group,Logistics
+tktelekom.pl,TK Telecom,Healthcare
+tm.net,Mercury Telecom,ISP
+tmc.edu,Truett McConnell University,Education
+tmcz.cz,T-Mobile,ISP
+tmd.ac.jp,Science Tokyo,Education
+tmdcloud.com,TMDHosting,Web Host
+tmddedicated.com,TMDHosting,Web Host
+tmkultra.net.br,Tmk Net,ISP
+tmodns.net,T-Mobile USA,ISP
+tnc-neuro.com,Tallahassee Neurological Clinic,Healthcare
+tofinosoftware.com,Tofino,SaaS
+tohoku-mpu.ac.jp,Tohoku Medical and Pharmaceutical University,Education
+tohoku.ac.jp,Tohoku University,Education
+tohoyk.co.jp,Toho Pharmaceutical,Healthcare
+top-tokyo.co.jp,TOP CORPORATION,Healthcare
+topauctions24-7.com,TopAuctions24-7,Retail
+tophost.ch,NovaTrend Services,Web Host
+topo.ai,Crisis24,SaaS
+tosis.co.jp,Tosoh Information Systems,MSP
+tosoh.co.jp,Tosoh,Industrial
+tpgi.com.au,TPG,ISP
+tpnet.pl,Orange,ISP
+tps.uz,TPS Telecom,ISP
+tradeindia.com,TradeIndia,SaaS
+transtelco.net,Flō Networks,ISP
+transtelecom.net,Trans Telecom,ISP
+trendmicro.com,Trend Micro,Email Security
+trendmicro.eu,Trend Micro,Email Security
+trentu.ca,Trent University,Education
+triadefibra.com.br,Tríade Fibra,ISP
+triolan.net,Triolan,ISP
+trivenet.it,Trivenet Telecomunicazioni,ISP
+truemail.co.th,True Internet,ISP
+truman.edu,Trueman State University,Education
+trustifi.com,Trustifi,Email Security
+tsimages.net,TSImages,SaaS
+tsukuba.ac.jp,University of Tsukuba,Education
+ttiinc.com,TTI,Industrial
+ttk.ru,Joint Stock Company TransTeleCom,ISP
+ttn.gob.ar,Tribunal de Tasaciones de la Nación,Government
+ttnet.com.tr,Türk Telekom,ISP
+tufts.edu,Tufts University,Education
+tulsaconnect.com,TULSACONNECT,MSP
+tunasgroup.com,Tunas Group,Automotive
+tvactelecom.com.br,TVAC Telecom,ISP
+tvpublica.com.ar,TVP,ISP
+twu.edu,Texas Woman's University,Education
+u-fukui.ac.jp,University of Fukui,Education
+u-tokai.ac.jp,Toki University,Education
+u-tokyo.ac.jp,University of Tokyo,Education
+uab.edu,The University of Alabama at Birmingham,Education
+ualberta.ca,University of Alberta,Education
+ubc.ca,The University of British Columbia,Education
+ucdavis.edu,UC Davis,Education
+uchealth.com,UC Health,Healthcare
+ucla.edu,UCLA,Education
+uclouvain.be,UCLouvain,Healthcare
+ucom.am,Ucom LLC,ISP
+ucom.ne.jp,Tsunagu Network Communications Inc.,ISP
+ufanet.ru,Ufanet,ISP
+ufl.edu,University of Florida,Education
+uhc.com,United Healthcare,Healthcare
+uhu.es,University of Huelva,Education
+uic.edu,University of Illinois Chicago,Education
+uky.edu,University of Kentucky,Education
+ultimatedomain.hosting,Ultimate Domain Hosting,Web Host
+ultravision.com.mx,Ultracel,ISP
+ultraweb.ca,Backland Communications,MSP
+ultrawebhosting.com,Ultra Web Hosting,Web Host
+umbc.edu,"University of Maryland, Baltimore County",Education
+umich.edu,University of Michigan,Education
+umin.ac.jp,University Hospital Medical Information Network (UHIN) of Japan,Healthcare
+umn.edu,University of Minnesota,Education
+unifiedlayer.com,UnifiedLayers,Web Host
+unin.hr,Sveučilište Sjever,Education
+uninet-ide.com.mx,Telmex,ISP
+unity-health.org,Unity Health,Healthcare
+univac.com.sg,Univac,Industrial
+universal-shoji.co.jp,Universal Shoji,Industrial
+untd.com,United Online,ISP
+uoeh-u.ac.jp,"University of Occupational and Environmental Health, Japan",Education
+uol.com.br,UOL - UNIVERSO ONLINE S/A,Web Host
+uplinkcrm.it,Uplink Web Agency Srl,SaaS
+ural-net.ru,inetvdom,ISP
+uscomputers.com,U.S. Computer Corporation,MSP
+usp.br,University of São Paulo,Education
+ussignalcom.net,US Signal,MSP
+usssa.com,USSSA,Sports
+utah.edu,University of Utah,Education
+utelesup.edu.pe,Universidad privada Telesup,Education
+uvm.edu,University of Vermont,Education
+uw.edu,University of Washington,Education
+uzpak.uz,uzpak.uz,Industrial
+v2soft.com,V2Soft,MSP
+va.gov,U.S. Department of Veterans Affairs,Government
+vadesecure.com,Vade Secure,Email Security
+valenet.com.br,Valenet,ISP
+vanwerthospital.org,Van Wert Health,Healthcare
+vdonsk.ru,Microel,ISP
+vectranet.pl,Vectra,ISP
+vedco.com,Vedco,Healthcare
+veetime.com,VeeTIME,ISP
+vegans.it,vegan/s,MSP
+vege.net,vege.net,Web Host
+ventech.com,C1,MSP
+verat.net,BeotelNet,ISP
+verginia.edu,University of Virginia,Education
+verizon.net,Verizon,ISP
+verizonbusiness.com,Verizon Business,ISP
+verointernet.com.br,Internet de Verdade,ISP
+versanet.de,1&1 Versatel,ISP
+vgohosting.com,HostPapa,Web Host
+vicc.co,Venco Imtiaz Contracting Co,Industrial
+victorkaiser.com,Global Transport,Logistics
+videotron.ca,Videotron,ISP
+videotron.com,Videotron,ISP
+viecuri.nl,VieCuri,Healthcare
+viettel.vn,Viettel,ISP
+virginia.edu,The University of Virginia,Education
+virginia.gov,The State of Virginia,Government
+virginm.net,Virgin Media,ISP
+virginmediabusiness.co.uk,Vergin Media Business,ISP
+virtrugateway.com,Virtu,Email Security
+virtua.com.br,Virtua Brizil,Marketing
+virtualhosting.hk,UDomain,Web Host
+visabeira.co.ao,COMATEL,ISP
+visi.com,US Signal,MSP
+visitmiddlesex.ca,"Middlesex County, Canada",Government
+vismap.it,Industrie Vismap,Retail
+vivozap.com.br,Vivo Mobile,ISP
+vnpt.vn,VNPT,ISP
+vnr.de,VNR Group,SaaS
+vodacom.co.za,Vodacom,ISP
+vodafonedsl.it,Vodafone Itily,ISP
+vodien.com,Vodien,Web Host
+voicehost.co.uk,VoiceHost,PaaS
+voith.com,Voith,Industrial
+volstate.net,IT Voice,MSP
+vom.com,Valley of the Moon,ISP
+vote4mentalhealth.org,NAMI,Healthcare
+votervoice.net,VoterVoice,SaaS
+vpath.co.za,Pathcare Vermaak,Healthcare
+vsu.by,Vitebsk State University,Education
+vtext.com,Verizon SMS,ISP
+vtgus.com,Virtual Technologies Group,MSP
+vtr.net,VTR,ISP
+vulcnmold.com,VulcanMold,Industrial
+vultrusercontent.com,Vultr,Web Host
+vwhs.org,Wally-Wide Health,Healthcare
+vyvebroadband.net,Vyve,ISP
+wadax-sv.jp,WADAX,Web Host
+wadax.ne.jp,WADAX,Web Host
+waldmann.com,Waldmann,Industrial
+wanadoo.fr,Orange,ISP
+washington.edu,University of Washington,Education
+wasip.com,WASIP Ltd.,Healthcare
+wavenetuk.net,Wavenet,MSP
+waypointcentre.ca,Waypoint Centre,Healthcare
+wbhcp.com,Williams Bros Pharmacy,Healthcare
+web-dns1.com,Web Hosting Canada,Web Host
+web-hosting.com,Namecheap,Web Host
+web.africa,Webafrica,ISP
+webbytelecom.com.br,Webby Internet,ISP
+webetic.net,Webetic,Web Host
+webglobe.com,Webglobe,Web Host
+webhostingireland.ie,Hosting Ireland,Web Host
+webland.ch,Webland,Web Host
+webline-servers.com,Webline Services,Web Host
+webmasters.com,Webmasters.com,Web Host
+webnames.ca,Webnames.ca,Web Host
+webninja.com.au,Web Ninja,SaaS
+webpal.com,WebPal,Web Host
+webpal.net,WebPal,Web Host
+webresolver.com,Holistic Technologies,MSP
+websitehostserver.net,GreenGeeks,Web Host
+websupport.se,Websuport,Web Host
+websupport.sk,Websupport,Web Host
+webzi.mx,Webzi,Web Host
+webzine1.com,Webzine Online,Web Host
+webzineonline.com,Webzine Online,Marketing
+wescor.com,Wescor Inc.,Healthcare
+westbrook.ms,Westbrook Construction,Construction
+westdc.net,WestHost,Web Host
+wfn.ca,Westbank First Nation,Government
+what-if.com,The Imagination Factory,MSP
+whitelighthost.net,Acklo,MSP
+wi.gov,The State of Wisconsin,Government
+wightman.ca,Wrightman Telecom,ISP
+wikitelecom.com.br,Wki Telecom,ISP
+willnet.org,WilliNet,ISP
+wind.it,WINDTRE,ISP
+windstream.net,Windstream,ISP
+wise.net.lb,WISE,ISP
+wizmoworks.com,Wizmo,MSP
+wlink.com.np,WorldLink Communications,ISP
+wmaker.net,WMaker,ISP
+wntellecom.net.br,WN Tellecom,ISP
+wolseleyinc.ca,Wolseley Canada,Industrial
+wordpress.com,Wordpress.com,Web Host
+workhorseirons.com,Workhorse Irons,Industrial
+worksmobile.com,Naver Works,SaaS
+wp.pl,Wirtualna Polska,Web Host
+wpx.ne.jp,wpX Speed,Web Host
+wpxhosting.com,WPX Hosting,Web Host
+wsh.care,The Woodlands Specialty Hospital,Healthcare
+wsigenesis.com,Action Hosting,Web Host
+wustl.edu,Washington University in St. Louis,Education
+wylance.com,Emma Solutions (Formerly Wylance),MSP
+xbiz.ne.jp,Xserver,Web Host
+xceleratorsoftware.com,Key Software Systems Xcelerator,SaaS
+xcitium.com,Xcitium,SaaS
+xecu.net,Xecunet,MSP
+xinet.com.mx,Xinet,MSP
+xipline.com,Ritter Communications,ISP
+xmission.com,XMission,SaaS
+xmr3.com,OpenText,SaaS
+xnet.mx,Xnet,MSP
+xrea.com,XREA,Web Host
+xserver.jp,Xserver,Web Host
+xyzservers.com,XYZ Servers,Web Host
+yadtel.net,Zirrus,ISP
+yahoo.co.jp,Yahoo Japan,Email Provider
+yahoo.com,Yahoo,Email Provider
+yamaguchi-u.ac.jp,Yamaguchi University,Education
+yamanashi.ac.jp,Yamanashi University,Education
+yamaoka.co.jp,Yamaoka,Industrial
+yandex.net,Yandex,Email Provider
+yelpcorp.com,Yelp,Social Media
+yesfibra.com.br,YES Fibra,ISP
+yettel.hu,Yettel,ISP
+ykwc.com,Yellowknife Wireless,ISP
+your-server.de,Hetzner,Web Host
+your-site.com,Your-Site.Com,Web Host
+yourconnect.com,Yourconnect,Web Host
+yourhostingaccount.com,Newfold Digital,Web Host
+yukanet.com.br,Ykaline,ISP
+yurekpharmacy.com,Yurek Pharmacy,Healthcare
+yuuai.or.jp,Social Medical Corporation Yuuaikai,Healthcare
+z.com,Z.com,Web Host
+zaansmc.nl,Zaans Medical Center,Healthcare
+zare.com,Zare,Web Host
+zbltelecom.net.br,ZBL Telecom,ISP
+zcmail.net,Zoho Campaigns,Marketing
+zcsend.net,Zoho Campaigns,Marketing
+zdsys.com,Zendesk,SaaS
+zedality.com,Zedality,Web Host
+zirrus.com,Xirrus.com,ISP
+zixcorp.com,Zix,Email Security
+zixsmbhosted.com,Zix,Email Security
+zixworks.com,Zix,Email Security
+zoho.com,Zoho,SaaS
+zoho.eu,Zoho,SaaS
+zoho.in,Zoho,SaaS
+zohocorporation.com,Zoho,SaaS
+zohomail.com,Zoho,SaaS
+zoneedit.com,Zoneedit,Web Host
+zsttk.ru,TTK,ISP
+zyner.net,Zyner,Email Provider
+zyner.one,Zyner,Email Provider
+zyner.org,Zyner,Email Provider
+zzn.com,ZZN,Email Provider
diff --git a/parsedmarc/resources/maps/base_reverse_dns_types.txt b/parsedmarc/resources/maps/base_reverse_dns_types.txt
new file mode 100644
index 0000000..cbbecb9
--- /dev/null
+++ b/parsedmarc/resources/maps/base_reverse_dns_types.txt
@@ -0,0 +1,44 @@
+Agriculture
+Automotive
+Beauty
+Conglomerate
+Construction
+Consulting
+Defense
+Education
+Email Provider
+Email Security
+Entertainment
+Event Planning
+Finance
+Food
+Government
+Government Media
+Healthcare
+ISP
+IaaS
+Industrial
+Legal
+Logistics
+MSP
+MSSP
+Manufacturing
+Marketing
+News
+Nonprofit
+PaaS
+Photography
+Physical Security
+Print
+Publishing
+Real Estate
+Retail
+SaaS
+Science
+Search Engine
+Social Media
+Sports
+Staffing
+Technology
+Travel
+Web Host
diff --git a/parsedmarc/resources/maps/find_unknown_base_reverse_dns.py b/parsedmarc/resources/maps/find_unknown_base_reverse_dns.py
index 2b5acee..8a36a86 100755
--- a/parsedmarc/resources/maps/find_unknown_base_reverse_dns.py
+++ b/parsedmarc/resources/maps/find_unknown_base_reverse_dns.py
@@ -15,22 +15,14 @@ def _main():
 
     output_rows = []
 
-    for p in [
-        input_csv_file_path,
-        base_reverse_dns_map_file_path,
-        known_unknown_list_file_path,
-        psl_overrides_file_path,
-    ]:
-        if not os.path.exists(p):
-            print(f"Error: {p} does not exist")
-            exit(1)
-
     known_unknown_domains = []
     psl_overrides = []
     known_domains = []
     output_rows = []
 
     def load_list(file_path, list_var):
+        if not os.path.exists(file_path):
+            print(f"Error: {file_path} does not exist")
         print(f"Loading {file_path}")
         list_var = []
         with open(file_path) as f:
@@ -44,9 +36,11 @@ def _main():
 
     load_list(known_unknown_list_file_path, known_unknown_domains)
     load_list(psl_overrides_file_path, psl_overrides)
-
-    print(f"Checking domains against {base_reverse_dns_map_file_path}")
+    if not os.path.exists(input_csv_file_path):
+        print(f"Error: {input_csv_file_path} does not exist")
+        exit(1)
     with open(input_csv_file_path) as f:
+        print(f"Checking domains against {base_reverse_dns_map_file_path}")
         for row in csv.DictReader(f):
             domain = row["source_name"].lower().strip()
             if domain == "":
diff --git a/parsedmarc/resources/maps/known_unknown_base_reverse_dns.txt b/parsedmarc/resources/maps/known_unknown_base_reverse_dns.txt
index 539299f..0b93da4 100644
--- a/parsedmarc/resources/maps/known_unknown_base_reverse_dns.txt
+++ b/parsedmarc/resources/maps/known_unknown_base_reverse_dns.txt
@@ -1,10 +1,12 @@
 185.in-addr.arpa
 190.in-addr.arpa
 200.in-addr.arpa
+444qcuhilla.com
 9services.com
 a7e.ru
 a94434500-blog.com
 abv-10.top
+adcritic.net
 adlucrumnewsletter.com
 admin.corpivensa.gob.ve
 advantageiq.com
@@ -15,6 +17,9 @@ aghories.com
 ai270.net
 albagroup-eg.com
 alchemy.net
+alohabeachcamp.net
+aluminumpipetubing.com
+americanstorageca.com
 anchorfundhub.com
 anglishment.com
 anteldata.net.uy
@@ -32,6 +37,7 @@ aurelienvos.com
 automatech.lat
 avistaadvantage.com
 b8sales.com
+banaras.co
 bearandbullmarketnews.com
 bestinvestingtime.com
 biocorp.com
@@ -42,14 +48,17 @@ bluhosting.com
 bodiax.pp.ua
 bost-law.com
 brainity.com
+brazalnde.net
 brnonet.cz
 brushinglegal.de
 brw.net
 budgeteasehub.com
 buoytoys.com
+c53dw7m24rj.com
 cashflowmasterypro.com
 cavabeen.com
 cbti.net
+chauffeurplan.co.uk
 checkpox.fun
 chegouseuvlache.org
 christus.mx
@@ -63,12 +72,16 @@ cnode.io
 code-it.net
 colombiaceropapel.org
 commerceinsurance.com
+comsharempc.com
 coolblaze.com
 coowo.com
 corpemail.net
 cp2-myorderbox.com
 cps.com.ar
 ctla.co.kr
+cumbalikonakhotel.com
+currencyexconverter.com
+daakbabu.com
 dastans.ru
 datahost36.de
 descarca-counter-strike.net
@@ -78,6 +91,7 @@ dinofelis.cn
 diwkyncbi.top
 dkginternet.com
 dns-oid.com
+domainserver.ne.jp
 domconfig.com
 doorsrv.com
 dreampox.fun
@@ -86,6 +100,7 @@ ds.network
 dvj.theworkpc.com
 dwlcka.com
 dyntcorp.com
+easternkingspei.com
 economiceagles.com
 egosimail.com
 emailgids.net
@@ -96,7 +111,9 @@ erestaff.com
 example.com
 exposervers.com-new
 eyecandyhosting.xyz
+feipnghardware.com
 fetscorp.shop
+fewo-usedom.net
 fin-crime.com
 financeaimpoint.com
 financeupward.com
@@ -104,19 +121,27 @@ flex-video.bnr.la
 formicidaehunt.net
 fosterheap.com
 frontiernet.net
+ftifb7tk3c.com
 gendns.com
+getgreencardsfast.com
 getthatroi.com
 gigidea.net
 giize.com
 ginous.eu.com
 gist-th.com
+goldsboroughplace.com
 gophermedia.com
 gqlists.us.com
 gratzl.de
 greatestworldnews.com
 greennutritioncare.com
 h-serv.co.uk
+haedefpartners.com
+halcyon-aboveboard.com
+hanzubon.org
 hgnbroken.us.com
+hopsinthehanger.com
+hostelsucre.com
 hosting1337.com
 hostinglotus.cloud
 hostingmichigan.com
@@ -137,20 +162,25 @@ idealconcept.live
 igppevents.org.uk
 imjtmn.cn
 immenzaces.com
+indulgent-holistic.com
 inshaaegypt.com
 ip-147-135-108.us
 ip-178-33-109.eu
 ip-ptr.tech
+iswhatpercent.com
 itsidc.com
 itwebs.com
 ivol.co
 jalanet.co.id
 jimishare.com
+jlenterprises.co.uk
+joyomokei.com
 jumanra.org
 kahlaa.com
 kbronet.com.tw
 kdnursing.org
 kihy.theworkpc.com
+kingschurchwirral.org
 kitchenaildbd.com
 layerdns.cloud
 legenditds.com
@@ -159,6 +189,7 @@ listertermoformadoa.com
 llsend.com
 lohkal.com
 lonestarmm.net
+longmarquis.com
 longwoodmgmt.com
 lwl-puehringer.at
 lynx.net.lb
@@ -173,7 +204,10 @@ matroguel.cam
 maximpactipo.com
 mechanicalwalk.store
 mediavobis.com
+mindworksunlimited.com
+mirth-gale.com
 misorpresa.com
+mjinn.com
 moderntradingnews.com
 moonjaws.com
 morningnewscatcher.com
@@ -182,8 +216,10 @@ mschosting.com
 msdp1.com
 mspnet.pro
 mts-nn.ru
+multifamilydesign.com
 mxserver.ro
 mxthunder.net
+my-ihor.ru
 myrewards.net
 mysagestore.com
 mysecurewebserver.com
@@ -202,67 +238,84 @@ newwallstreetcode.com
 ngvcv.cn
 nic.name
 nidix.net
+nieuwedagnetwerk.net
 nlscanme.com
 nmeuh.cn
 noisndametal.com
 nwo.giize.com
+nwwhalewatchers.org
 offerslatedeals.com
 office365.us
 ogicom.net
+olivettilexikon.co.uk
 omegabrasil.inf.br
 onnet21.com
 oppt-ac.fit
 orbitel.net.co
+outsidences.com
 ovaltinalization.co
 overta.ru
+ox28vgrurc.com
 panaltyspot.space
 passionatesmiles.com
+paulinelam.com
 perimetercenter.net
 permanentscreen.com
 phdns3.es
+pigelixval1.com
 planethoster.net
 plesk.page
 pmnhost.net
+pokiloandhu.net
 pokupki5.ru
 popiup.com
 ports.net
 prima.com.ar
 prima.net.ar
+profsol.co.uk
 prohealthmotion.com
 proudserver.com
 psnm.ru
 pvcwindowsprices.live
 qontenciplc.autos
 quatthonggiotico.com
+qxyxab44njd.com
 rapidns.com
 raxa.host
 reliablepanel.com
 rgb365.eu
 riddlecamera.net
+riddletrends.com
+runnin-rebels.com
 rwdhosting.ca
 s500host.com
 sahacker-2020.com
 samsales.site
 saransk.ru
 satirogluet.com
+scioncontacts.com
 seaspraymta3.net
 secorp.mx
 securen.net
 securerelay.in
 securev.net
 servershost.biz
+shopfox.ca
 silvestrejaguar.sbs
 silvestreonca.sbs
+simplediagnostics.org
 siriuscloud.jp
 sisglobalresearch.com
 smallvillages.com
 smartape-vps.com
 solusoftware.com
+southcoastwebhosting12.com
 spiritualtechnologies.io
 sprout.org
 stableserver.net
 stockepictigers.com
 stockexchangejournal.com
+subterranean-concave.com
 suksangroup.com
 sysop4.com
 system.eu.com
@@ -276,8 +329,10 @@ thaicloudsolutions.com
 thaimonster.com
 thepushcase.com
 totaal.net
+tqh.ro
 traderlearningcenter.com
 tullostrucking.com
+turbinetrends.com
 ultragate.com
 unite.services
 urawasl.com
@@ -294,8 +349,10 @@ web-login.eu
 weblinkinternational.com
 webnox.io
 welllivinghive.com
+whoflew.com
 wisdomhard.com
 wisewealthcircle.com
+wodeniowa.com
 wsiph2.com
 xnt.mx
 xpnuf.cn
diff --git a/parsedmarc/resources/maps/sortlists.py b/parsedmarc/resources/maps/sortlists.py
new file mode 100755
index 0000000..0e1840b
--- /dev/null
+++ b/parsedmarc/resources/maps/sortlists.py
@@ -0,0 +1,184 @@
+#!/usr/bin/env python3
+
+from __future__ import annotations
+
+import os
+import csv
+from pathlib import Path
+from typing import Mapping, Iterable, Optional, Collection, Union, List, Dict
+
+
+class CSVValidationError(Exception):
+    def __init__(self, errors: list[str]):
+        super().__init__("\n".join(errors))
+        self.errors = errors
+
+
+def sort_csv(
+    filepath: Union[str, Path],
+    field: str,
+    *,
+    sort_field_value_must_be_unique: bool = True,
+    strip_whitespace: bool = True,
+    fields_to_lowercase: Optional[Iterable[str]] = None,
+    case_insensitive_sort: bool = False,
+    required_fields: Optional[Iterable[str]] = None,
+    allowed_values: Optional[Mapping[str, Collection[str]]] = None,
+) -> List[Dict[str, str]]:
+    """
+    Read a CSV, optionally normalize rows (strip whitespace, lowercase certain fields),
+    validate field values, and write the sorted CSV back to the same path.
+
+    - filepath: Path to the CSV to sort.
+    - field: The field name to sort by.
+    - fields_to_lowercase: Permanently lowercases these field(s) in the data.
+    - strip_whitespace: Remove all whitespace at the beginning and of field values.
+    - case_insensitive_sort: Ignore case when sorting without changing values.
+    - required_fields: A list of fields that must have data in all rows.
+    - allowed_values: A mapping of allowed values for fields.
+    """
+    path = Path(filepath)
+    required_fields = set(required_fields or [])
+    lower_set = set(fields_to_lowercase or [])
+    allowed_sets = {k: set(v) for k, v in (allowed_values or {}).items()}
+    if sort_field_value_must_be_unique:
+        seen_sort_field_values = []
+
+    with path.open("r", newline="") as infile:
+        reader = csv.DictReader(infile)
+        fieldnames = reader.fieldnames or []
+        if field not in fieldnames:
+            raise CSVValidationError([f"Missing sort column: {field!r}"])
+        missing_headers = required_fields - set(fieldnames)
+        if missing_headers:
+            raise CSVValidationError(
+                [f"Missing required header(s): {sorted(missing_headers)}"]
+            )
+        rows = list(reader)
+
+    def normalize_row(row: Dict[str, str]) -> None:
+        if strip_whitespace:
+            for k, v in row.items():
+                if isinstance(v, str):
+                    row[k] = v.strip()
+        for fld in lower_set:
+            if fld in row and isinstance(row[fld], str):
+                row[fld] = row[fld].lower()
+
+    def validate_row(
+        row: Dict[str, str], sort_field: str, line_no: int, errors: list[str]
+    ) -> None:
+        if sort_field_value_must_be_unique:
+            if row[sort_field] in seen_sort_field_values:
+                errors.append(f"Line {line_no}: Duplicate row for '{sort_field}'")
+            else:
+                seen_sort_field_values.append(sort_field)
+        for rf in required_fields:
+            val = row.get(rf)
+            if val is None or val == "":
+                errors.append(
+                    f"Line {line_no}: Missing value for required field '{rf}'"
+                )
+        for field, allowed_values in allowed_sets.items():
+            if field in row:
+                val = row[field]
+                if val not in allowed_values:
+                    errors.append(
+                        f"Line {line_no}: '{val}' is not an allowed value for '{field}' "
+                        f"(allowed: {sorted(allowed_values)})"
+                    )
+
+    errors: list[str] = []
+    for idx, row in enumerate(rows, start=2):  # header is line 1
+        normalize_row(row)
+        validate_row(row, field, idx, errors)
+
+    if errors:
+        raise CSVValidationError(errors)
+
+    def sort_key(r: Dict[str, str]):
+        v = r.get(field, "")
+        if isinstance(v, str) and case_insensitive_sort:
+            return v.casefold()
+        return v
+
+    rows.sort(key=sort_key)
+
+    with path.open(filepath, "w", newline="") as outfile:
+        writer = csv.DictWriter(outfile, fieldnames=fieldnames)
+        writer.writeheader()
+        writer.writerows(rows)
+
+
+def sort_list_file(
+    filepath: Union[str, Path],
+    *,
+    lowercase: bool = True,
+    strip: bool = True,
+    deduplicate: bool = True,
+    remove_blank_lines: bool = True,
+    ending_newline: bool = True,
+    newline: Optional[str] = "\n",
+):
+    """Read a list from a file, sort it, optionally strip and deduplicate the values,
+    then write that list back to the file.
+
+    - Filepath: The path to the file.
+    - lowercase: Lowercase all values prior to sorting.
+    - remove_blank_lines: Remove any plank lines.
+    - ending_newline: End the file with a newline, even if remove_blank_lines is true.
+    - newline: The newline character to use.
+    """
+    with open(filepath, mode="r", newline=newline) as infile:
+        lines = infile.readlines()
+        for i in range(len(lines)):
+            if lowercase:
+                lines[i] = lines[i].lower()
+            if strip:
+                lines[i] = lines[i].strip()
+        if deduplicate:
+            lines = list(set(lines))
+        if remove_blank_lines:
+            while "" in lines:
+                lines.remove("")
+        lines = sorted(lines)
+        if ending_newline:
+            if lines[-1] != "":
+                lines.append("")
+    with open(filepath, mode="w", newline=newline) as outfile:
+        outfile.write("\n".join(lines))
+
+
+def _main():
+    map_file = "base_reverse_dns_map.csv"
+    map_key = "base_reverse_dns"
+    list_files = ["known_unknown_base_reverse_dns.txt", "psl_overrides.txt"]
+    types_file = "base_reverse_dns_types.txt"
+
+    with open(types_file) as f:
+        types = f.readlines()
+        while "" in types:
+            types.remove("")
+
+    map_allowed_values = {"Type": types}
+
+    for list_file in list_files:
+        if not os.path.exists(list_file):
+            print(f"Error: {list_file} does not exist")
+            exit(1)
+        sort_list_file(list_file)
+    if not os.path.exists(types_file):
+        print(f"Error: {types_file} does not exist")
+        exit(1)
+    sort_list_file(types_file, lowercase=False)
+    if not os.path.exists(map_file):
+        print(f"Error: {map_file} does not exist")
+        exit(1)
+    try:
+        sort_csv(map_file, map_key, allowed_values=map_allowed_values)
+    except CSVValidationError as e:
+        print(f"{map_file} did not validate: {e}")
+
+
+if __name__ == "__main__":
+    _main()
diff --git a/parsedmarc/resources/maps/sortmaps.py b/parsedmarc/resources/maps/sortmaps.py
deleted file mode 100755
index d3bf046..0000000
--- a/parsedmarc/resources/maps/sortmaps.py
+++ /dev/null
@@ -1,69 +0,0 @@
-#!/usr/bin/env python3
-
-import os
-import csv
-
-maps_dir = os.path.join(".")
-map_files = ["base_reverse_dns_map.csv"]
-list_files = ["known_unknown_base_reverse_dns.txt", "psl_overrides.txt"]
-
-
-def sort_csv(filepath, column=0, strip_whitespace=True):
-    with open(filepath, mode="r", newline="\n") as infile:
-        reader = csv.reader(infile)
-        header = next(reader)
-
-        def normalize_row(row):
-            return [
-                field.strip() if strip_whitespace and isinstance(field, str) else field
-                for field in row
-            ]
-
-        rows = [normalize_row(row) for row in reader]
-        sorted_rows = sorted(rows, key=lambda row: row[column])
-        existing_values = []
-        for row in sorted_rows:
-            if row[column] in existing_values:
-                print(f"Warning: {row[column]} is in {filepath} multiple times")
-            else:
-                existing_values.append(row[column])
-
-    with open(filepath, mode="w", newline="\n") as outfile:
-        writer = csv.writer(outfile, lineterminator="\n")
-        writer.writerow(header)
-        writer.writerows(sorted_rows)
-
-
-def sort_list_file(
-    filepath,
-    lowercase=True,
-    strip=True,
-    deduplicate=True,
-    remove_blank_lines=True,
-    ending_newline=True,
-    newline="\n",
-):
-    with open(filepath, mode="r", newline=newline) as infile:
-        lines = infile.readlines()
-        for i in range(len(lines)):
-            if lowercase:
-                lines[i] = lines[i].lower()
-            if strip:
-                lines[i] = lines[i].strip()
-        if deduplicate:
-            lines = list(set(lines))
-        if remove_blank_lines:
-            while "" in lines:
-                lines.remove("")
-        lines = sorted(lines)
-        if ending_newline:
-            if lines[-1] != "":
-                lines.append("")
-    with open(filepath, mode="w", newline=newline) as outfile:
-        outfile.write("\n".join(lines))
-
-
-for csv_file in map_files:
-    sort_csv(os.path.join(maps_dir, csv_file))
-for list_file in list_files:
-    sort_list_file(os.path.join(maps_dir, list_file))