Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '3.163.243.0'
+230
ERRNo PTR record availible DNS server 'pdns1.ultradns.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.243.163.3.in-addr.arpa'.