Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '202.139.252.0'
+309
ERRNo PTR record availible DNS server 'ns2.apnic.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.252.139.202.in-addr.arpa'.