Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2a13:7f00:1::'
+137
ERRNo PTR record availible DNS server 'rirns.arin.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.0.0.0.0.0.f.7.3.1.a.2.ip6.arpa'.