1.37.199.in-addr.arpa is a domain controlled by three nameservers. Two of them are on the same IP network. att.net, ici.com, ave.com, mehk.com, apol.com and at least 54 other hosts share nameservers with this domain. 37.199.in-addr.arpa is a domain controlled by three nameservers. Two of them are on the same IP network.