Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '50.59.94.0'
+227
ERRNo PTR record availible DNS server 'ns4.level3.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.94.59.50.in-addr.arpa'.