Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '109.121.47.0'
+219
ERRNo PTR record availible DNS server 'ns3.lacnic.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.47.121.109.in-addr.arpa'.