Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '80.81.56.0'
+210
ERRNo PTR record availible DNS server 'ns3.afrinic.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.56.81.80.in-addr.arpa'.