Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2403:6b80:7::'
+166
ERRNo PTR record availible DNS server 'apnic.authdns.ripe.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.7.0.0.0.0.8.b.6.3.0.4.2.ip6.arpa'.