Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '146.66.3.0'
+176
ERRNo PTR record availible DNS server 'udns2.ultradns.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.3.66.146.in-addr.arpa'.