Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '66.232.20.0'
+105
ERRNo PTR record availible DNS server 'b.ns.hackerone.com' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.20.232.66.in-addr.arpa'.