Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '91.190.191.0'
+052
ERRNo PTR record availible DNS server 'ns3.afrinic.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.191.190.91.in-addr.arpa'.