Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2607:6d40:4000::'
+072
ERRNo PTR record availible DNS server 'r.arin.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.0.4.d.6.7.0.6.2.ip6.arpa'.