Summary
209.252.131.in-addr.arpa is a domain controlled by three nameservers. Two of them are on the same IP network.
co.gy,
co.mz,
ac.mz,
co.ci,
nic.do and at least 68 other hosts share nameservers with this domain.
252.131.in-addr.arpa is delegated to three nameservers, however one extra nameserver is listed in the zone. Some of them are on the same IP network.