Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '192.244.8.0'
+642
ERRNo PTR record availible DNS server 'dns-b.iij.ad.jp' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.8.244.192.in-addr.arpa'.