Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2606:9fc0:31::'
+251
ERRNo PTR record availible DNS server 'x.arin.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.3.0.0.0.c.f.9.6.0.6.2.ip6.arpa'.