Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '206.16.240.0'
+243
ERRNo PTR record availible DNS server 'ns13.dnsmadeeasy.com' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.240.16.206.in-addr.arpa'.