diff --git a/parsedmarc/resources/maps/base_reverse_dns_map.csv b/parsedmarc/resources/maps/base_reverse_dns_map.csv
index e836aac..656d95d 100644
--- a/parsedmarc/resources/maps/base_reverse_dns_map.csv
+++ b/parsedmarc/resources/maps/base_reverse_dns_map.csv
@@ -39,6 +39,8 @@ base_reverse_dns,name,type
 3kt.eu,3K Technology,MSP
 3m.com,3M,Manufacturing
 3utilities.com,No-IP,Web Host
+3z.net,3z,MSP
+3zden.cloud,3z,MSP
 45ru.net.au,HostAway,Web Host
 47.pl,AfterMarket.pl,Web Host
 4gbhost.com,4GBHost,Web Host