Unable to find any PTR-records for the specified domain/ip :(
Log
+001
Resolving PTR record of '2600:9000:30d7::'
+189
ERRNo PTR record availible DNS server 'x2.amazonaws.com' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.7.d.0.3.0.0.0.9.0.0.6.2.ip6.arpa'.