Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2a02:a300::'
+446
ERRNo PTR record availible DNS server 'ns1.upc.biz' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.3.a.2.0.a.2.ip6.arpa'.