228.88.84.in-addr.arpa is a domain controlled by four nameservers. Some of them are on the same IP network. icc.es, uic.cat, udg.edu, icc.cat, cbuc.es and at least 35 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.