Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '124.30.121.0'
+1.267
ERRNo PTR record availible DNS server 'sdns.sify.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.121.30.124.in-addr.arpa'.