DNS

Reverse DNS

Query

Address
216.73.216.76
Reverse name
76.216.73.216.in-addr.arpa

PTR records

No PTR record: this address has no reverse DNS name.

Forward-confirmed reverse DNS (FCrDNS): the PTR name must resolve back (A) to the same address. Mail servers often require it. Answers come from this server's recursive resolver and may be cached.