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 PTR record yourself
dig (macOS / Linux)
dig PTR example.com +short
nslookup (any OS)
nslookup -type=PTR example.com
Your resolver may still be serving a cached copy — our propagation checker queries 30+ resolvers worldwide so you can see who already has the new PTR record.
Look up a real PTR record
Query any domain live and see every record type with its TTL.