Map any IP address back to its hostname using reverse DNS (PTR record) lookup. Commonly used to verify mail server identity, investigate suspicious IPs, and audit network infrastructure.
Verifying that a mail server's IP has a valid PTR record (required by many spam filters), investigating unknown IPs in server logs, or confirming CDN and hosting provider assignments.
Look up the hostname associated with an IP address. Reverse DNS (PTR record) lookup helps identify servers and verify email sending infrastructure.