Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '203.139.240.0'
+343
ERRNo PTR record availible DNS server 'ns-422.awsdns-52.com' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.240.139.203.in-addr.arpa'.