Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '45.223.12.0'
+121
ERRNo PTR record availible DNS server 'r.arin.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.12.223.45.in-addr.arpa'.