Summary
60.164.140.in-addr.arpa is delegated to six nameservers, however all six delegated nameservers are missing in the zone. Two nameservers have the same IP number. Some of them are on the same IP network.
nic.it,
pd.cnr.it,
ba.cnr.it,
na.cnr.it,
pi.cnr.it and at least 30 other hosts share nameservers with this domain.
164.140.in-addr.arpa is delegated to two nameservers, however one delegated nameserver is missing in the zone. All nameservers are at
na.cnr.it. They are on the same IP network.