145.113.84.in-addr.arpa is a domain controlled by two nameservers at chello.at. They are on different IP networks. upc.nl, chello.hu, chorus.ie, chello.sk, surfer.at and at least 92 other hosts share nameservers with this domain. 113.84.in-addr.arpa is a domain controlled by four nameservers. Two nameservers have the same IP number. Two of them are on the same IP network.