Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '172.111.8.0'
+331
ERRNo PTR record availible DNS server 'ns1.he.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.8.111.172.in-addr.arpa'.