Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '138.104.233.0'
+637
ERRNo PTR record availible DNS server 'dns.mottmac.co.uk' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.233.104.138.in-addr.arpa'.