Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '216.145.217.0'
+405
ERRNo PTR record availible DNS server 'dns04.mimecast.com' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.217.145.216.in-addr.arpa'.