Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '52.129.103.0'
+200
ERRNo PTR record availible DNS server 'ns-21.awsdns-02.com' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.103.129.52.in-addr.arpa'.