Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '89.100.0.0'
+337
ERRNo PTR record availible DNS server 'ns.ripe.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.100.89.in-addr.arpa'.