Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '148.253.240.0'
+187
ERRNo PTR record availible DNS server 'x.arin.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.240.253.148.in-addr.arpa'.