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DNS tool

Reverse DNS lookup

Enter an IPv4 or IPv6 address and look up PTR hostnames published for that address.

What this tool does

Reverse DNS looks up PTR records for an IP address. A PTR record can point an address back to a hostname such as a mail server, cloud instance, crawler, or provider-managed gateway.

PTR records are optional and are controlled by whoever manages the reverse DNS zone for the address. A missing or generic hostname is normal for many residential, mobile, VPN, and cloud networks.

Your IP address Check the public IP address, request metadata, and network context shown to websites. DNS lookup Look up A, AAAA, MX, TXT, NS, and canonical-name records for a domain. What is an ASN? Understand how network ownership and routing data relate to IP addresses. Public vs private IP Check why private addresses usually do not have public PTR records.