Reverse DNS lookup
Enter a public IP address to query its reverse DNS name. The optional forward check compares the returned hostname's address records with the original IP.
Queries go directly from your browser to the selected public DNS resolver. Use public DNS names only. Read how queries are handled.
A public-looking split-DNS name may still be confidential. Do not paste internal-only names.
Results
Enter a query and press Look up PTR.
This link includes the queried name, not saved results. Review exported DNS answers before sharing; they may contain public tokens or other sensitive-looking data.
PTR is a separate record
An A or AAAA record does not automatically create reverse DNS. IPv4 reverse queries use in-addr.arpa; IPv6 uses reversed hexadecimal nibbles under ip6.arpa. The address-space operator or delegated reverse-DNS service controls these records, which may be different from the service hosting the forward domain.
Understand a forward match
A forward match means a returned hostname currently resolves back to the queried address in this observation. It is useful evidence of consistency, not proof of device ownership, website ownership, sender reputation or identity. Several names can appear, and the tool states when its bounded check did not cover all of them.
Not a reverse website search
This tool does not list every website hosted on an IP. Shared hosting, proxies and content-delivery networks are not discoverable from a PTR lookup alone. Private-network addresses should be checked using the private network's DNS rather than public resolvers.
Need to create the reverse name?
Use the existing Reverse DNS / PTR Converter to format record and zone names. This live lookup checks published answers; it does not create records or delegate a reverse zone.