Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '52.129.105.0'
+223
ERRNo PTR record availible DNS server 'ns-21.awsdns-02.com' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.105.129.52.in-addr.arpa'.