Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '216.157.133.0'
+115
ERRNo PTR record availible DNS server 'ns-170.awsdns-21.com' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.133.157.216.in-addr.arpa'.