Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '50.115.219.0'
+336
ERRNo PTR record availible DNS server 'usc5.akam.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.219.115.50.in-addr.arpa'.