Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2001:48b0::'
+227
ERRNo PTR record availible DNS server 'ns0.iij-america.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.b.8.4.1.0.0.2.ip6.arpa'.