Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '103.5.23.0'
+536
ERRNo PTR record availible DNS server 'ns100.videx.co.jp' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.23.5.103.in-addr.arpa'.