Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '15.220.228.0'
+432
ERRNo PTR record availible DNS server 'ns3-16-multi.ec2-rdns.amazonaws.com' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.228.220.15.in-addr.arpa'.