Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '31.28.71.0'
+418
ERRNo PTR record availible DNS server 'ns3.as60672.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.71.28.31.in-addr.arpa'.