Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '148.188.224.0'
+290
ERRNo PTR record availible DNS server 'ns4.perf1.de' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.224.188.148.in-addr.arpa'.