Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '66.6.56.0'
+521
ERRNo PTR record availible DNS server 'ns2.nexdapp.com' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.56.6.66.in-addr.arpa'.