Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '220.100.192.0'
+268
ERRNo PTR record availible DNS server 'ns1.apnic.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.192.100.220.in-addr.arpa'.