Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '54.240.227.0'
+186
ERRNo PTR record availible DNS server 'x3.amazonaws.org' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.227.240.54.in-addr.arpa'.