base_reverse_dns,name,type
1e100.net,Google,Technology
2tay.kz,2DAY Telecom LLP,ISP
a2hosting.com,A2Hosting,Web Host
ab-group.biz,AsiaBell,ISP
accessmedlab.com,Access Medical Labs,Healthcare
acelerate.net,AXS Bolivia S. A.,ISP
activegate-ss.jp,Active! gate SS,Email Security
adairit.com,Adair IT,MSP
admintek.net,Admintek,Web Host
admintekcr.net,Admintek,Web Host
adnsl.com,ADN Telecom,ISP
adp.com,ADP,Finance
adventconstructions.co.tz,Advent Construction Limited,Industrial
aeroinc.net,The Areo Group,Industrial
aeza.network,Aeza,Web Host
afghan-wireless.com,Afgan Wireless,ISP
af-k.de,I-NetPartner GmbH,ISP
aichi-colony.jp,Aichi Developmental Disability Center,Healthcare
aigmedical.com,Affiliates in Gastroenterology,Healthcare
aila.org,American Immigration Lawyers Association,Nonprofit
airtel.co.zm,Airtel,ISP
airtelbroadband.in,Airtel,ISP
ajusa.com,AJ-USA,Retail
aknet.kg,AkNet,ISP
albatros.uz,Albatros Health Care,Healthcare
alembic.co.in,Alembic Pharmaceuticals,Healthcare
alestra.net.mx,Alestra,ISP
alpha-prm.jp,Otsuka Corporation,ISP
altel.kz,Atel,ISP
altmanadvisors.com,Altman Advisors,Finance
amazonaws.com,Amazon Web Services (AWS),PaaS
amazonses.com,Amazon SES,SaaS
ambisys.net,Ambisys,Healthcare
americanam.org,American Advanced Management,Healthcare
amethyst.co.jp,Amethyst,Healthcare
antelecom.net,Antelecom,ISP
antispamcloud.com,N-able,Email Security
antispameurope.com,Hornetsecurity,Email Security
applicationx.net,Application X,MSP
appriver.com,OpenText AppRiver,Email Security
aqmhost.net,AqmHost,Web Host
aragon.es,Government of Aragon,Government
archerirm.us,RSA Archer GRC,SaaS
arizona.edu,University of Arizona,Education
arpinet.am,Arpinet,ISP
aruba.it,Aruba.it.,Web Host
asahikawa-med.ac.jp,Asahikawa Med,Healthcare
ashtelstudios.com,Ashtel Studios,Healthcare
askbis.com,BIS,Web Host
assentportal.com,Assent,SaaS
atmailcloud.com,atmail,Email Provider
ats.ca,ATS Healthcare,Healthcare
atw.ne.jp,ATW,Web Host
aussiebb.com.au,Aussie Broadband,ISP
aviso.ci,Orange,ISP
axtel.net,Axtel,ISP
azeronline.com,Azeronline,ISP
azteca-comunicaciones.com,Aztec Communications Columbia,ISP
azure.com,Microsoft Azure,PaaS
balifiber.id,BaliFiber,ISP
barracuda.com,Barracuda,Email Security
bayada.com,BAYADA Home Health Care,Healthcare
bayer.de,Bayer,Healthcare
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
betterhomeowners.com,InTouch Systems,Marketing
bigcommerce.net,BigCommerce,SaaS
bisv.ru,Bisv.ru,ISP
blacknight.com,Blacknight Solutions,Web Host
bluehost.com,Bluehost,Web Host
bluemission.net,Blue Mission,Web Host
bluetie.com,BlueTie,MSP
bohc.co.jp,Benefit One Inc.,Retail
bov.com,Bank of Valletta,Finance
bracnet.net,BRACNet Limited,ISP
bravehost.com,Bravenet,Web Host
bravenet.com,Bravenet,Web Host
braveriver.com,Brave River,MSP
breezelineohio.net,Breezeline,ISP
brinkster.com,Brinkster,Web Host
bulsat.com,Bulsatcom,ISP
burnhamholdings.com,Burnham Holdings,Industrial
buroserv.net.au,Brunoserv,ISP
cable.net.co,Cablenet,ISP
caiway.nl,Caiway,ISP
calero.com,Calero,MSP
calpoly.edu,Cal Poly,Education
canonet.ne.jp,Canonet,MSP
cardinalhealth.com,Cardinal Health,Healthcare
carecentrix.com,CareCentrix,Healthcare
carrierzone.com,carrierzone,Email Security
cbe.ae,CBE,Construction
cbwchc.org,Charles B. Wang Community Health,Healthcare
ccc-group.com,Canada Colors and Chemicals Limited (CCC),Industrial
celeste.fr,CELESTE,ISP
centerasecurity.com,Centera Email Defence,Email Security
centerasecurity.dk,Centera Email Defence,Email Security
centralinteractiva.com.mx,Central Interactiva,Marketing
centurylink.com.pe,Cirion,MSP
charter.net,Charter,ISP
chikamori.com,Chikamori Health Care Group,Healthcare
childrenscolorado.org,Children's Hospital Colorado,Healthcare
chinamobile.com,China Mobile,ISP
chinaunicom.cn,China Unicom,ISP
chinaxingye.com,Suzhou Sinye Materials Technology,Industrial
cimcorp.com,Cimcorp,Industrial
circleamedical.com,Circle A Medical,Healthcare
cirrushosting.com,Cirrus Hosting,Web Host
cisco.com,Cisco,Technology
ckt.net,Craw-Kan Telephone Cooperative,ISP
claro.com.ec,Claro,ISP
claro.net.do,Mail2World,Email Provider
clearwave.com,Clearwave Fiber,ISP
clemson.edu,Clemson University,Education
climaideal.com,Clima Ideal,Retail
cloudfilter.net,Proofpoint Cloudmark,Email Security
cloudflare.net,Cloudflare,SaaS
cloudflare-email.net,Cloudflare,Email Security
cloud-sec-av.com,Check Point Avanan,Email Security
cloudwaysapps.com,Cloudways,Web Host
cniteam.com,CNI,ISP
colocrossing.com,ColoCrossing,ISP
comcast.net,Comcast,ISP
comcastbusiness.net,Comcast Business,ISP
communitect.com,Solutionreach,SaaS
computronics.com,Computronics,Technology
concurcompleat.com,Concur Compleat,SaaS
concursolutions.com,SAP Concur,SaaS
condosites.net,CondoSites,SaaS
conoha.ne.jp,ConoHa,Web Host
constantcontact.com,Constant Contact,Marketing
contaboserver.net,Contabo,Web Host
corbina.ru,PJSC VimpelCom,ISP
cornell.edu,Cornell University,Education
cotecal.com.ar,Cotecal,ISP
cox.net,Cox Communications,ISP
cp247.net,M247,Web Host
cpi.ad.jp,CPI,Web Host
cpsinet.com,TruBridge,Healthcare
creehan.com,Inovalon (Formerly Creehan & Company),Healthcare
csloxinfo.com,CSL,MSP
csod.com,Cornerstone,SaaS
ctbcbank.com.ph,CTBC Bank (Philippines) Corp.,Finance
cuenote.jp,Cuenote,SaaS
cvent-planner.com,Cvent,SaaS
cvtsv.com,Cvent,SaaS
cwru.edu,Case Western Reserve University,Education
cyberlynk.net,CyberLynk,MSP
cybermail.jp,CyberMail,Email Provider
cybernextech.co.th,CYBER NEXTECH,Web Hosting
cyfrowypolsat.pl,Polsat Box,ISP
d2s.cloud,d2s.cloud,Web Host
daemonmail.ner,DaemonMail,Email Provider
dailyinvesthub.com,Daily Invest Hub,Finance
damel.com,Damel Group,Food
ddccommunications.com,DDC public affairs,Marketing
default-host.net,INHOSTED LP,Web Host
delhitel.net,Delhi Telephone Company,ISP
dexanet.co.id,Dexanet,ISP
dhl.com,DHL,logistics
diakovere.de,DIAKOVERE,Healthcare
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
disenosweb.mx,Hive Studio,Web Host
dishemail.com,DISH,ISP
dji.com,DJI,Technology
dlivry.co,Twilio SendGrid,Marketing
dosscloudservices.com,Doss Business Systems,MSP
doteasy.com,Doteasy,Web Host
dotroll.com,DotRoll,Web Host
dreamcompute.com,Dreamhost,Web Hosting
dreamhost.com,Dreamhost,Web Host
dreamhostps.com,Dreamhost,Web Host
dslon.ws,Dslon Wireless,ISP
dvcotechnology.com,Cision,Marketing
dynamic-mytachyon.in,Tachyon Communications,ISP
e2ma.net,Emma,Marketing
eastern-tele.com,Eastern Communications,ISP
eastlink.ca,Eastlink,ISP
easydns.com,easyDNS,Web Host
eboundhost.com,eBoundhost,Web Host
echolabs.net,Echo Labs,MSP
edgepark.com,Edgepark,Healthcare
eduneering.com,UL EHS training,SaaS
ehafconsulting.org,EHAF Consulting Engineers,Construction
ehostsolution.net,E Host Solution,Web Hosting
eigbox.net,Newfold Digital,Web Host
eircom.net,Eir,ISP
elcat.kg,ElCat,ISP
electric.net,VIPRE,Email Security
eleven.mx,E;rven Marketing Labs,Marketing
elink.net,Earthlink,ISP
elive.net,Elive,Web Hosting
emailarray.com,Emailarray,Email Provider
emailservice.io,Mailprotector,Email Security
emailsrv.net,Mailprotector,Email Security
emailsrvr.com,Rackspace Email,Email Security
encrypttitan.net,EncryptTitan,Email Security
enguard.com,EnGuard,Email Security
entelchile.net,Entel,ISP
entrata.com,Entrata,SaaS
epicura.be,EpiCURA,Healthcare
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
etipres.com,ETIPRES,Print
etouches.com,Stova,SaaS
eventsairmail.com,EventsAir,SaaS
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
expedia.net,Expedia,Travel
ezorg.nl,E-Zorg,Healthcare
fastnet.kg,FastNet,ISP
fastspeed.dk,Fastspeed,ISP
fedex.com,FedEx,Logistics
fiberhub.com,FiberHub,ISP
fireeyecloud.com,FireEye,Email Security
fireeyegov.com,FireEye (Government),Email Security
firstcloudsecurity.net,CyberCision,Email Security
fisherpaykel.com,Fisher & Paykel,Retail
flinnsci.com,Flinn Scientific,Healthcare
flywheelsites.com,Flywheel,Web Host
fmcna.com,Fresenius Medical Care,Healthcare
fmu.ac.jp,Fukushima Medical University,Education
formassembly.com,FormAssembly,SaaS
forthnet.gr,Nova,ISP
fortimail.com,Fortinet FortiMail,Email Security
forwardemail.net,ForwardEmail.net,Email Provider
fourseasonspediatrics.com,Four Seasons Pediatrics,Healthcare
franchisemail.net,FranConnect,SaaS
freehostia.com,Freehostia,Web Host
fujita-hu.ac.jp,Fujita Health University,Healthcare
fuse.net,Altafiber (Formerly Cincinnati Bell),ISP
fusionconnect.com,Fusion Connect,MSP
gaggle.net,Gaggle,SaaS
gandi.net,Gandi.net,Web Host
gastrogainesville.com,Gastroenterology Associates of Gainesville,Healthcare
gci.net,GCI,ISP
gen2fund.com,Gen II,Finance
ghm-grenoble.fr,Groupe hospitalier mutualiste de Grenoble,healthcare
globalit.com,Global IT,MSP
gmoserver.jp,GMO,Web Hosting
gmu.edu,George Mason University,Education
gmx.com,GMX,Email Provider
godaddy.com,GoDaddy,Web Host
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
gsbridge.com,Golden State Bridge,Industrial
gtnexus.com,Infor Nexus (Formerly GT Nexus),SaaS
gwu.edu,The George Washington University,Education
hanami.run,Mailwip (Formerly Hanami),Email Provider
hanastar.net.id,HSnet,ISP
harrishealth.org,Harris Health System,Healthcare
harvard.edu,Harvard University,Education
healthall.com,UC Health,Healthcare
healthcaresupplypros.com,Healthcare Supply Pros,Healthcare
healthproductsforyou.com,Health Products For You,Healthcare
helpscout.net,Help Scout,SaaS
heywoodhill.com,Heywood Hill,Retail
hhsys.org,Huntsville Hospital,Healthcare
hickorytech.net,Consolidated Communications,ISP
highradiuscorp.com,HighRadius,Finance
highspot.com,Highspot,Marketing
hinet.net,HiNet,ISP
h-isac.org,H-ISAC,Healthcare
hokudai.ac.jp,Hokkaido University,Education
hostedemail.com,HostedEmail.com,Email Provider
hosting.ie,Irish Domains Limited,Web Host
hosting-mexico.net,Hosting-Mexico,Web Host
hostmonster.com,Hostmonster,Web Host
hostneverdie.com,Hostneverdie,Web Host
hostresolver.net,Stack Harbor,Web Host
hosts.co.uk,Namesco Limited,Web Host
hostsevenplus.com,HostSevenPlus,Web Host
hostwindsdns.com,Hostwinds,Web Host
hotnet.net.il,Hot Net Internet Services,ISP
htc.net,HTC,ISP
htmlservices.it,HTMLServices.it,MSP
hubspotemail.net,HubSpot,Marketing
hughston.com,Hughston Clinic,Healthcare
hvvc.us,Hivelocity,Web Host
i4i.com,i4i,Technology
ice.co.cr,Grupo ICE,Industrial
ideaservers.net,Hetzner,Web Host
idig.net,Canadian Web Hosting,Web Host
iftnet.com.br,IFTNET Telecom,ISP
iglou.com,IgLou Internet Services,ISP
ilap.com,ILAP,ISP
improvmx.com,ImprovMX,Email Provider
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
infolink.ru,Infolink,ISP
inforcloudsuite.com,Infor,SaaS
inkyphishfence.com,INKY,Email Security
inmotionhosting.com,InMotion Hosting,Web Host
innovasur.com,Innovasur,MSP
inspiren.my,Inspiren,Marketing
instantprint.com,Instant Print Corp,Print
intermetalsa.co.mz,Intermetal,Construction
internetmailserver.net,Internet Mail Server Networks,Email Provider
investinmiddlesex.ca,"Middlesex County, Canada",Government
inxserver.de,Inxmail,Marketing
ionblade.com,IonBLADE,Web Host
iphmx.com,Cisco Cloud Email Security (CES),Email Security
iphotel.net.br,IPHOTEL Hospedagem de Sites LTDA,Web Host
iphouse.net,ipHouse,Web Host
iqhive.com,IQ Hive,MSP
ironwoodcrc.com,Ironwood Cancer & Research Centers,Healthcare
ispgateway.de,domainfactory GmbH,Web Host
isplevel.pro,ISPLevel,Web Host
ispn.net,ISPN,MSP
ispserver.com,ISPServer,Web Hosting
issr.ru,Mobile TeleSystems,ISP
itscom.net,iTSCOM,IPS
iwashiya-nagai.co.jp,Iwashiya Nagai Co,Healthcare
jikei.ac.jp,The Jikei University,Education
johnshopkins.edu,Johns Hopkins University,Education
jweiland12.net,domainfactory GmbH,Web Host
kagoya.net,KAGOYA,Web Host
kalittacharters.com,Kalitta Charters,Logistics
kcell.kz,Kcell,ISP
kcn.ne.jp,KCN,ISP
kddi.ne.jp,KIDDI,ISP
kendall.cz,GPS Praha,Healthcare
kennesawtrans.com,Kennesaw Transportation,Logistics
keralavisionisp.com,Keralavision Broadband,ISP
kingswoodfacadesthailand.com,Kingswood Facades Thailand,Industrial
kirkbrothers.com,Kirk Brothers Supercenter,Automotive
klinik-arlesheim.ch,Klinik Aresheim,Healthcare
kmtn.ru,Kostrom City Telephone Network,ISP
knet.kg,Kyrgyztelecom,ISP
kobe-u.ac.jp,Kobe University,Education
kodiaksys.com,ARIOS,SaaS
kovacmed.com,KOVAC-MED,Healthcare
kreativemachinez.tech,Kreative Machinez,Marketing
kryptronic.com,Kryptronic,SaaS
ktc.kz,KTC Kazakhstan LLP,Industrial
kundenserver.de,domainfactory GmbH,Web Host
kyoto-u.ac.jp,Kyoto University,Education
l3harris.com,L3Harris,Defense
larkinhospital.com,Larkin Health System,Healthcare
larrycomputerguy.com,Larry The Computer Guy,MSP
lauruslabs.com,Lasarus Labs,Healthcare
lb.go.gov.br,Government of Goias State Brasil,Government 
lcmh.com,Lake Charles Memorial Health System,Healthcare
leftor.ba,Leftor,Web Hosting
lestetelecom.com.br,Leste,ISP
lghealth.org,Penn Medicine Lancaster General Health,Healthcare
link3.net,Link3 Technologies,ISP
linkedin.com,LinkedIn,Social Media
live-servers.net,Fasthosts Internet Ltd,Web Host
llumc.edu,Loma Linda University Medical Center,Healthcare
locaweb.com.br,Locaweb,Web Host
logix.in,Logix InfoSecurity,MSP
lpn.co.th,L.P.N. Development PCL,Real Estate
lstn.net,Limestone Networks,Web Host
luxsci.com,LuxSci,Email Security
lytehosting.com,Lyte Hosting,Web Hosting
m9network.com,Volico Data Centers,Web Host
macrx.com,MAC Rx,Healthcare
maersk.com,Maersk,Logistics
mail.ru,Mail.ru,Email Provider
mail2world.com,Mail2World,Email Provider
mailbaby.net,Mail Baby,Email Security
mailchannels.net,MailChannels,Web Host
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
mailinblack.com,Mailinblack,Email Security
mailplug.co.kr,Mailplug,Email Provider
mailplug.com,Mailplug,Email Provider
mailroute.net,MailRoute,Email Security
mailsecure.jp,NTTPC Communications,Email Security
mailspamprotection.com,SiteGround,Web Host
makeshop.jp,makeshop,SaaS
mandrillapp.com,Mailchimp Transactional,SaaS
mark-itt.net,Point Internet,ISP
marriott-service.com,Marriott,Travel
materprivate.ie,Mater Private Network,Healthcare
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
mchsi.com,MediacomCable,ISP
mcmaster.com,McMaster-Crr,Manufacturing
mcsv.net,Intuit Mailchimp,Marketing
mdlsx.ca,"Middlesex County, Canada",Government
me.com,Apple iCloud,Email Provider
medline.com,Medline,Healthcare
mega.kg,Maga-Line,ISP
mega.kg,Mega-Line,ISP
megacom.kg,MegaCom,ISP
megamailservers.com,MegaMailServers,MSP
menlosecurity.com,Menlo Security,Email Security
mercranet.com,Mercranet,Web Host
mercurygate.net,MercuryGate,SaaS
messagelabs.com,Symantec Email Security,Email Security
messagingengine.com,Fastmail,Email Provider
mesvr.com,ReadNotify,Email Provider
metricsthatmatter.com,Metrics That Matter,SaaS
mho.de,Marienhospital Osnabrück,Healthcare
mhos.de,Marienhospital Osnabrück,Healthcare
mia.net,HostDrive,Web Host
miamioh.edu,Miami University,Education
microsoft.com,Microsoft,Technology
middlesex.ca,"Middlesex County, Canada",Government
mimecast.com,Mimecast,Email Security
mit.edu,MIT,Education
mivamerchant.net,Mirva,SaaS
mknetwork.com.br,MkK Network Telecom,ISP
mktomail.com,Marketo,Marketing
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
modenesegastone.com,Modenese Gastone,Retail
molalla.net,Molalla Communications,ISP
moniker.com,Moniker,Web Host
moovik.com.ua,MooVik,Retail
movitel.co.mz,Movitel,ISP
msgexch.com,Constant Contact,Marketing
mtaroutes.com,N-able,Email Security
mtasv.net,Postmark,SaaS
mts.ru,MTS,ISP
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
mxrecord.io,Area 1 Email Security,Email Security
mxrecord.mx,Area 1 Email Security,Email Security
mxroute.com,MXroute,Email Provider
mydsomanager.com,My DSO Manager,SaaS
myfleetvehicle.com,ATS Processing Services,Finance
mymts.net,Bell MTS,ISP
mysecurecloudhost.com,World Host Group,Web Host
my-tss.com,Performive,MSP
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
nano.uz,Nano Telecom,ISP
naviexp.jp,NaviExp,MSP
nbcb.cn,Bank of Ningbo,Finance
needles.co.kr,Tae Chang Industrial,Healthcare
netcore.co.in,Netcore,Marketing
netdesignhost.com,Netdesign Group,Web Host
netfinn.net,netFinn,Web Host
netmds.com,Net Doctors,MSP
netrevolution.com,NetRevolution,ISP
netroad.ru,Mobile TeleSystems,ISP
netsolus.com,netsolus KC,MSP
net-uno.net,Net Uno,ISP
neuca.pl,NECUA Group,Healthcare
newsunseo.com,NewSunSEO,Marketing
newtekwebhosting.com,Newtek Technology Solutions,Web Host
ngpweb.com,Bonterra,Marketing
nhisac.org,H-ISAC,Healthcare
nicmail.ru,RU-CENTER,Email Provider
nifty.com,@nifty,Web Host
niigata-u.ac.jp,Niigata University,Education
nititancommercial.com,Niti Tan Commercial,Industrial
nordstrom.com,Nordstrom,Retail
northwestern.edu,Northwestern University,Education
novotelecom.ru,Novo Telcom,ISP
npcma.ru,Nizhnekamsk Enterprise,Industrial
ntirety.com,Ntirety,MSP
nw027.com,Poppulo (Formerly Newsweaver),SaaS
o2.cz,O2,ISP
obit.kz,OBIT,ISP
ocn.ad.jp,NTT,ISP
octacom.ca,Octacom,MSP
odoo.com,Odoo,SaaS
odu.edu,Ohio Dominican University,Education
ohio.edu,Ohio University,Education
okayama-u.ac.jp,Okayama University,Education
okta.com,Okta,SaaS
o-mx.com,Omedia,Marketing
one.com,One.com,Web Host
one.th,One Platform,Email Provider
one-mail.on.ca,eHealth Ontario,Healthcare
online.kz,Kazakhtelecom,ISP
online.net,Scaleway,Email Provider
online.tj.cn,China Unicom,ISP
openair.com,Oracle NetSuite OpenAir,SaaS
opentext.com,OpenText,SaaS
optimus.si,Optimus IT d.o.o.,MSP
orange.es,Orange,ISP
orange.fr,Orange,Email Provider
orangecustomers.net,Orange,ISP
orbital.net,Orbital Net,ISP
oregonstate.edu,Oregon State University,Education
ori.net,ORI,ISP
orthodoxws.com,Orthodox Web Solutions,Web Host
osu.edu,The Ohio State University,Education
ottcmail.com,Ontario & Trumansburg Telephone Companies,ISP
outlook.cn,Outlook (China),Email Provider
outlook.com,Outlook (Personal and Microsoft 365),Email Provider
ovh.net,OVH,Web Host
ovh.us,OVH,Web Host
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
palette-up.jp,Palette UP,Web Host
panelvps.net,PanelBox,Web Hosting
parkerinstitute.org,Parker Jewish Institute for Healthcare & Rehabilitation,Healthcare
paubox.com,Paubox,Email Security
pd25.com,Salesforce Marketing Cloud (Formerly Pardot),Marketing
peaknet.net,PeakNet,Industrial
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
pfmsys.com,Professional Flight Management (PFM),Logistics
pipefy.com,Pipefy Inc,SaaS
plala.or.jp,Plala,ISP
playbackmail.com,PlayBackMail,Email Provider
pldt.net,PLDT,ISP
plus.pl,Plus,ISP
pobox.com,Pobox,Email Provider
pol.ir,ParsOnline,ISP
pol-online.com,Bangladesh Online,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
privatelayer.com,Private Layer,Web Host
privatesystems.net,PrivateSystems.net,Web Host
profitserver.ru,Profitserver,Web Host
proton.ch,Proton,Email Provider
protonmail.ch,Proton,Email Provider
pserver.space,Profitserver,Web Host
psychz.net,Psychz Networks,Web Host
ptd.net,PTD,ISP
pucminas.br,PUC Minas,Education
puc-rio.br,PUC Rio,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
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
qvidian.com,Qvidian,SaaS
rackspace.com,Rackspace,Web Host
ramsaysante.fr,Ramsay Santé,Healthcare
raycdjr.com,Ray Chrysler Dodge Jeep RAM,Automotive
rcn.com,RCN,ISP
redbird.net,NexGenAccess (Formerly Redbird),ISP
redexpertos.com,RedExpertos,Web Host
redirection.net,Redirectionet,Web Host
regiomed-kliniken.de,REGIOMED-KLINIKEN GmbH,Healthcare
registeredsite.com,Web.com,Web Host
regxa.com,Regxa Cloud,Web Host
rheamedical.org,Rhea Medical Center,ISP
riberasaludmail.com,Ribera Salud,Healthcare
riskonnectclearsight.com,Riskonnect ClearSight,SaaS
ritternet.com,Ritter Communications,ISP
rmx.de,Retarus GmbH,SaaS
rootlayer.net,RootLayer LTD.,Web Host
rsa.com,RSA,Technology
rsgsv.net,Intuit Mailchimp,Marketing
rt.ru,RT,Government Media
rutgers.edu,Rutgers University,Education
rzone.de,Strato AG,Web Host
safaricombusiness.co.ke,Safaricom,ISP
saimanet.kg,Saima Telecom,ISP
sakura.ne.jp,SAKURA Internet,ISP
salesforce.com,Salesforce,SaaS
samanage.com,SolarWinds Service Desk,SaaS
sandrix.com,Sandrix Technologies,MSP
sarkor.uz,Sarkor,ISP
scaledsystems.com,SimpleNet,Web Hosting
scatair.com,Scatair,Manufacturing
schmc.ac.kr,Soon Chun Hyang University Medical Center,Healthcare
scorm.com,SCORM,SaaS
sdldelivery.com,Specialty Delivery & Logistics,Logistics
secure.ne.jp,KIDDI,ISP
secure-mails.com,Tata Communications,SaaS
securemailserver.ca,securemailserver.ca,Email Provider
securemx.jp,IIJ SecureMX,Email Security
securence.com,Securence,Email Security
secureserver.net,GoDaddy,Web Host
sendgrid.net,Twilio SendGrid,Marketing
sendio.com,Sendio,Email Security
sendoso.com,Sendoso,Marketing
seqtek.net,SEQTEK,MSP
servconfig.com,InMotion Hosting,Web Host
serverdata.net,GoDaddy,Web Host
servicemail24.de,Arvato Systems,MSP
service-now.com,ServiceNow,SaaS
servidoresdns.net,Arsys,Web Host
shatel.ir,Shatel,ISP
sheffieldpharma.com,Sheffield Pharmaceuticals,Healthcare
showpad.com,Showpad,Marketing
sibyl.com,Sibl Design,MSP
simpro.com.br,Simpro,Healthcare
simus.uz,Simus,ISP
siriustelecom.uz,Sirius Telecom,ISP
siteprotect.com,SiteMail,Email Provider
sl-reverse.com,IBM Cloud,PaaS
smartape.ru,Smart Ape LLC,Web Host
smartspb.net,Smart Telecom,ISP
smtp.com,SMTP.com,SaaS
smtp25.com,Zix,Email Security
smtp2go.com,SMTP2GO,SaaS
socgen.com,Societe Generale,Finance
socialfive.com,Social5,Marketing
socket.net,Socket,ISP
sophos.com,Sophos,Email Security
spamtitan.com,SpamTitan,Email Security
sparkpostmail.com,SparkPost,Marketing
spectrum.com,Spectrum,ISP
speedway.hk,Speedway Travels,Travel
spglobal.com,S&P Global,Finance
srvape.com,Smart Ape LLC,Web Host
stanford.edu,Stanford University,Education
stargatecommunications.com,X-Link Limited,ISP
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
stellarllc.net,Gardonville Cooperative Telephone Association,ISP
stewarthowe.com,Newfold Digital,Web Host
stomabags.com,Stomabags.com,Healthcare
stonybrook.edu,Stonybrook University,Education
strategictreasurer.com,Strategic Treasurer,Finance
stratoserver.net,STRATO,Web Host
superb.net,CherryRoad (Formerly Superb Internet),Web Host
sureserver.com,SureSupport LLC,Web Hosting
swishmail.com,Swishmail,MSP
syn-alias.com,Synacor,SaaS
synchronoss.net,Synchronoss,SaaS
sysaidit.com,SysAid,SaaS
sysnet.ie,VikingCloud,MSP
tachc.org,Texas Association of Community Health Centers (TACHC),Healthcare
takethemameal.com,Take Them A Meal,SaaS
tanglewoodhealth.com,Tanglewood Medical Supplies,Healthcare
tctwest.net,TCT,ISP
teche.net,Uniti,MSP
telecom.kz,Kazakhtelecom,ISP
telecom.net.ar,Telecom Argentina,ISP
telecomitalia.it,TIM,ISP
telefonica.de,Telef�nica Germany,ISP
telekom.rs,MTS,ISP
telepac.pt,SAPO,Email Provider
telepacific.net,TPx Communications,ISP
telus.net,TELUS,ISP
tenders.net,Tenders.net,SaaS
terra.com,Terra Networks,Web Hosting
tevapharm.com,Teva Pharmaceuticals,Healthcare
thechristhospital.com,The Christ Hospital,Healthcare
thomsonreuters.com,Thomson Reuters,SaaS
tical.com,Grupo Tical,Logistics
tidewater.net,Tidewater Telecom,ISP
tie.cl,Telefónica Internet Empresas S.A.,ISP
tigerconnect.com,TigerConnect,SaaS
tim.it,TIM,ISP
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
tktelekom.pl,TK Telecom,Healthcare
tm.net,Mercury Telecom,ISP
tmc.edu,Truett McConnell University,Education
tmcz.cz,T-Mobile,ISP
tmddedicated.com,TMDHosting,Web Host
tohoku.ac.jp,Tohoku University,Education
tohoyk.co.jp,Toho Pharmaceutical,Healthcare
tosoh.co.jp,Tosoh,Industrial
tps.uz,TPS Telecom,ISP
tradeindia.com,TradeIndia,SaaS
transtelecom.net,Trans Telecom,ISP
trendmicro.com,Trend Micro,Email Security
trendmicro.eu,Trend Micro,Email Security
trivenet.it,Trivenet Telecomunicazioni,ISP
truemail.co.th,True Internet,ISP
ttk.ru,Joint Stock Company TransTeleCom,ISP
tufts.edu,Tufts University,Education
twu.edu,Texas Woman's University,Education
uab.edu,The University of Alabama at Birmingham,Education
ubc.ca,The University of British Columbia,Education
uchealth.com,UC Health,Healthcare
ucla.edu,UCLA,Education
uclouvain.be,UCLouvain,Healthcare
ucom.am,Ucom LLC,ISP
ufanet.ru,Ufanet,ISP
ufl.edu,University of Florida,Education
u-fukui.ac.jp,University of Fukui,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
ultravision.com.mx,Ultracel,ISP
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
uninet-ide.com.mx,Telmex,ISP
unity-health.org,Unity Health,Healthcare
univac.com.sg,Univac,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
uscomputers.com,U.S. Computer Corporation,MSP
usp.br,University of São Paulo,Education
ussignalcom.net,US Signal,MSP
utah.edu,University of Utah,Education
u-tokai.ac.jp,Toki University,Education
u-tokyo.ac.jp,University of Tokyo,Education
uvm.edu,University of Vermont,Education
uw.edu,University of Washington,Education
va.gov,U.S. Department of Veterans Affairs,Government
vanwerthospital.org,Van Wert Health,Healthcare
vdonsk.ru,Microel,ISP
vectranet.pl,Vectra,ISP
vedco.com,Vedco,Healthcare
vegans.it,vegan/s,MSP
verginia.edu,University of Virginia,Education
verizon.net,Verizon,ISP
verizonbusiness.com,Verizon Business,ISP
vicc.co,Venco Imtiaz Contracting Co,Construction
videotron.ca,Videotron,ISP
videotron.com,Videotron,ISP
viecuri.nl,VieCuri,Healthcare
viettel.vn,Viettel,ISP
virginia.edu,The University of Virginia,Education
virtua.com.br,Virtua Brizil,Marketing
virtualhosting.hk,UDomain,Web Host
visitmiddlesex.ca,"Middlesex County, Canada",Government
vnpt.vn,VNPT,ISP
vtext.com,Verizon SMS,ISP
vulcnmold.com,VulcanMold,Industrial
vwhs.org,Wally-Wide Health,Healthcare
wadax.ne.jp,WADAX,Web Host
wadax-sv.jp,WADAX,Web Host
washington.edu,University of Washington,Education
wasip.com,WASIP Ltd.,Healthcare
wbhcp.com,Williams Bros Pharmacy,Healthcare
web-hosting.com,Namecheap,Web Host
webhostingireland.ie,Hosting Ireland,Web Host
webpal.com,WebPal,Web Hosting
webzineonline.com,Webzine Online,Marketing
wescor.com,Wescor Inc.,Healthcare
westdc.net,WestHost,Web Host
what-if.com,The Imagination Factory,MSP
wightman.ca,Wrightman Telecom,ISP
windstream.net,Windstream,ISP
wise.net.lb,WISE,ISP
wizmoworks.com,Wizmo,MSP
wntellecom.net.br,WN Tellecom,ISP
wordpress.com,Wordpress.com,Web Host
wpx.ne.jp,wpX Speed,Web Hosting
wpxhosting.com,WPX Hosting,Web Host
wsh.care,The Woodlands Specialty Hospital,Healthcare
wustl.edu,Washington University in St. Louis,Education
xbiz.ne.jp,Xserver,Web Host
xceleratorsoftware.com,Key Software Systems Xcelerator,SaaS
xecu.net,Xecunet,MSP
xinet.com.mx,Xinet,MSP
xmission.com,XMission,SaaS
xrea.com,XREA,Web Host
xserver.jp,Xserver,Web Host
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
yelpcorp.com,Yelp,Social Media
yourconnect.com,"Yourconnect,Web Host
your-server.de,Hetzner,Web Host
yurekpharmacy.com,Yurek Pharmacy,Healthcare
z.com,Z.com,Web Hosting
zaansmc.nl,Zaans Medical Center,Healthcare
zare.com,Zare,Web Host
zdsys.com,Zendesk,SaaS
zixcorp.com,Zix,Email Security
zixsmbhosted.com,Zix,Email Security
zixworks.com,Zix,Email Security
zoho.com,Zoho,SaaS
zoho.in,Zoho,SaaS
zohocorporation.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
