Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '52.129.100.0'
+172
ERRNo PTR record availible DNS server 'ns-1314.awsdns-36.org' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.100.129.52.in-addr.arpa'.