Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '68.128.0.0'
+230
ERRNo PTR record availible DNS server 'auth100.ns.uu.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.128.68.in-addr.arpa'.