Unable to find any PTR-records for the specified domain/ip :(
Log
+000
Resolving PTR record of '185.221.84.0'
+212
ERRNo PTR record availible DNS server 'ns02.nr-dns.net' raised an NotExistentDomain error, while beeing queried for PTR-records on domain '0.84.221.185.in-addr.arpa'.