Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '71.251.224.0'
+137
ERRNo PTR record availible DNS server 'ns5.verizon.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.224.251.71.in-addr.arpa'.