Summary
1.6.e164.arpa is delegated to twelve nameservers, however all twelve delegated nameservers are missing in the zone and one other nameserver is listed. There are two duplicated IP numbers. Some of them are on the same IP network.
id.au,
oz.au,
asn.au,
net.au,
edu.au and at least 34 other hosts share nameservers with this domain.
0.1.6.e164.arpa are subdomains to this hostname.