Unable to find any PTR-records for the specified domain/ip :(
Log
+005
Resolving PTR record of '199.16.174.0'
+253
ERRNo PTR record availible DNS server 'r.arin.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.174.16.199.in-addr.arpa'.