Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '168.100.71.0'
+086
ERRNo PTR record availible DNS server 'ns-1087.awsdns-07.org' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.71.100.168.in-addr.arpa'.