Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '46.184.138.0'
+140
ERRNo PTR record availible DNS server 'rirns.arin.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.138.184.46.in-addr.arpa'.