Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2404:3600::'
+451
ERRNo PTR record availible DNS server 'pns51.cloudns.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.6.3.4.0.4.2.ip6.arpa'.