Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '2001:218::'
+549
ERRNo PTR record availible DNS server 'auth25.ns.gin.ntt.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.1.2.0.1.0.0.2.ip6.arpa'.