Email deliverability
Mail servers often compare the sending IP address with its PTR hostname before accepting a message.
PTR record tool
Reverse DNS Lookup
Find the hostname associated with an IP address. Enter an IPv4 or IPv6 address to query its reverse DNS PTR record.
Ready for a reverse lookup
Your result will show the hostname and the reverse lookup name used for the DNS query.
What is reverse DNS?
Reverse DNS maps an IP address back to a hostname through a PTR record. It is commonly used for email delivery checks, logging, network troubleshooting, and verifying server identity.
Troubleshooting
Confirm the identity of an IP address in logs, traceroutes, security alerts, and infrastructure inventories.
PTR records
Unlike most DNS records, PTR records are usually controlled by the owner of the IP address range.