Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '149.20.11.0'
+444
ERRNo PTR record availible DNS server 'ns3.isc.org' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.11.20.149.in-addr.arpa'.