Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '8.3.54.0'
+197
ERRNo PTR record availible DNS server 'ns1.level3.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.54.3.8.in-addr.arpa'.