Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2a13:7f00:2::'
+050
ERRNo PTR record availible DNS server 'ns4.apnic.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.0.0.0.0.f.7.3.1.a.2.ip6.arpa'.