Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2a12:1b80::'
+156
ERRNo PTR record availible DNS server 'pri.authdns.ripe.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.1.2.1.a.2.ip6.arpa'.