Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '168.100.123.0'
+095
ERRNo PTR record availible DNS server 'ns-45.awsdns-05.com' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.123.100.168.in-addr.arpa'.