Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '206.166.248.0'
+121
ERRNo PTR record availible DNS server 'a.ns.hackerone.com' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.248.166.206.in-addr.arpa'.