Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '220.156.64.0'
+388
ERRNo PTR record availible DNS server 'dns0.iij.ad.jp' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.64.156.220.in-addr.arpa'.