Summary
66.59.128.in-addr.arpa is delegated to four nameservers, however one delegated nameserver is missing in the zone and one other nameserver is listed instead. Some of them are on the same IP network.
tc.edu,
cjr.org,
nieh.net,
3rox.net,
sdsc.edu and at least 93 other hosts share nameservers with this domain.
59.128.in-addr.arpa is a domain controlled by four nameservers. Two of them are on the same IP network.