Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2a13:2e01:4::'
+344
ERRNo PTR record availible DNS server 'ns3.afrinic.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.0.0.0.1.0.e.2.3.1.a.2.ip6.arpa'.