66.39.65.in-addr.arpa is delegated to two nameservers, however one delegated nameserver is missing in the zone and one other nameserver is listed instead. Two nameservers have the same IP number. Some of them are on the same IP network. rwf.net, upt.org, amug.org, amug.net, hutch.org and at least 39 other hosts share nameservers with this domain.