Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2600:9000:a400::'
+175
ERRNo PTR record availible DNS server 'ns-1081.awsdns-07.org' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.4.a.0.0.0.9.0.0.6.2.ip6.arpa'.