Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '104.192.137.0'
+202
ERRNo PTR record availible DNS server 'ns-251.awsdns-31.com' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.137.192.104.in-addr.arpa'.