Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2001:49f0:d0bf::'
+162
ERRNo PTR record availible DNS server 'ns4.fdcservers.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.f.b.0.d.0.f.9.4.1.0.0.2.ip6.arpa'.