Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '192.68.180.0'
+132
ERRNo PTR record availible DNS server 'ns2-auth.sprintlink.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.180.68.192.in-addr.arpa'.