62.152.21.64.in-addr.arpa is delegated to two nameservers, however both delegated nameservers are missing in the zone. All nameservers are at site5.com. They are on the same IP network. 4d.net, ctws.us, cljs.org, hhfi.org, pljs.org and at least 55 other hosts share nameservers with this domain. 152.21.64.in-addr.arpa is a domain controlled by two nameservers at nac.net. They are on the same IP network.