191.66.192.in-addr.arpa is delegated to two nameservers, however both delegated nameservers are missing in the zone. All nameservers are at ipweb.dk. They are on different IP networks. gi.dk, bf.dk, efs.dk, ler.dk, bvb.dk and at least 48 other hosts share nameservers with this domain. 66.192.in-addr.arpa is a domain controlled by three nameservers. Two of them are on the same IP network.