Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2600:9000:11e3::'
+424
ERRNo PTR record availible DNS server 'x4.amazonaws.org' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.e.1.1.0.0.0.9.0.0.6.2.ip6.arpa'.