Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '142.4.160.0'
+331
ERRNo PTR record availible DNS server 'z.arin.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.160.4.142.in-addr.arpa'.