Pointer Record (Reverse DNS)
PTR implements reverse DNS: returns a hostname for an IP address. Lives in the in-addr.arpa (IPv4) / ip6.arpa (IPv6) zone.
Syntax
reversed_ip.in-addr.arpa TTL IN PTR hostname
Example
34.216.184.93.in-addr.arpa. 86400 IN PTR example.com.
When to use
When: mandatory for mail servers (PTR must match the hostname). Helps anti-spam checks.
Common mistakes
Common mistakes: missing PTR — mail goes to spam. PTR is configured at the ISP/host, not at the registrar.
Check PTR records for any domain:
Open DNS Lookup →