Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '64.252.78.0'
+135
ERRNo PTR record availible DNS server 'pdns1.ultradns.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.78.252.64.in-addr.arpa'.