PTR record
Reverse DNS: maps an IP address back to a hostname. It lives in the address owner's zone, not yours, so your hosting provider usually sets it.
What one looks like
34.216.184.93.in-addr.arpa. 3600 IN PTR example.com.
Things worth knowing
- Mail servers check that a sending IP has a PTR record matching its hostname; without one, delivery suffers badly.
- You cannot set it in your own DNS — ask whoever controls the IP block.
- Forward and reverse should agree: the PTR name should resolve back to the same address.
Look up a real PTR record
Query any domain live and see every record type with its TTL.