72.88.84.in-addr.arpa is a domain controlled by six nameservers. Some of them are on the same IP network. ub.es, bt.es, iac.es, uji.es, ieo.es and at least 44 other hosts share nameservers with this domain. 88.84.in-addr.arpa is a domain controlled by three nameservers. Two of them are on the same IP network.