Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '104.193.207.0'
+123
ERRNo PTR record availible DNS server 'ns-592.awsdns-10.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.207.193.104.in-addr.arpa'.