Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2606:f4c0:44c0::'
+143
ERRNo PTR record availible DNS server 'z.arin.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.c.4.4.0.c.4.f.6.0.6.2.ip6.arpa'.