If I do a lookup on my domain I get the following: ping -a 10.10.10.10 Pinging 10-10-10-10.mydomain.com [10.10.10.10] with 32 bytes of data From checking other domains they look like this: Pinging mydomain.com [10.10.10.10] with 32 bytes of data I tested dns and get: WARNING: Forward-DNS does NOT match Reverse-DNS. DNS is INCONSISTENT. Please request your Admin or Provider to fix this. Why 10-10-10-10.mydomain.com
I'd say it's a combination of two things. - Someone has added 10.10.10.10 to your mydomain.com zone - You have mydomain.com as a search suffix in your operating system's settings I'd call it quite normal and everything is behaving as it should. Probably no one has added a PTR record for 10.10.10.10 in your reverse lookup zone.
