Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '216.120.187.0'
+312
ERRNo PTR record availible DNS server 'r.arin.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.187.120.216.in-addr.arpa'.