Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '117.104.64.0'
+108
ERRNo PTR record availible DNS server 'ns2.apnic.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.64.104.117.in-addr.arpa'.