76.69.80.in-addr.arpa is delegated to three nameservers, however all three delegated nameservers are missing in the zone and three other nameservers are listed instead. There are three duplicated IP numbers. Some of them are on the same IP network. 7c.nl, rng.nl, vba.nl, caw.nl, dyc.nl and at least 50 other hosts share nameservers with this domain.