Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '91.212.43.0'
+274
ERRNo PTR record availible DNS server 'ns1.fisglobal.com' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.43.212.91.in-addr.arpa'.