Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '74.164.224.0'
+224
ERRNo PTR record availible DNS server 'ns10a.attdns.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.224.164.74.in-addr.arpa'.