Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '163.171.90.0'
+302
ERRNo PTR record availible DNS server 'ns1.apnic.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.90.171.163.in-addr.arpa'.