Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '104.234.137.0'
+221
ERRNo PTR record availible DNS server 'ns-1446.awsdns-52.org' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.137.234.104.in-addr.arpa'.