Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '5.23.0.0'
+312
ERRNo PTR record availible DNS server 'ns1.as6453.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.23.5.in-addr.arpa'.