167.231.192.in-addr.arpa is delegated to three nameservers, however all three delegated nameservers are missing in the zone. All of them are on different IP networks. id.au, oz.au, asn.au, net.au, com.au and at least 59 other hosts share nameservers with this domain. au.167.231.192.in-addr.arpa are subdomains to this hostname.