Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '144.220.108.0'
+142
ERRNo PTR record availible DNS server 'x1.amazonaws.com' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.108.220.144.in-addr.arpa'.