IP to Hostname (Reverse DNS) Lookup Tool Online Free
Use the IP to Hostname (Reverse DNS) tool to look up a hostname for an IPv4 or IPv6 address. It performs a reverse DNS lookup using the address’s PTR record: IPv4 becomes an in-addr.arpa name and IPv6 an ip6.arpa name. The generated name is queried through DNS-over-HTTPS, so a network connection is required.
The IP to Hostname (Reverse DNS) tool looks up the hostname associated with an IPv4 or IPv6 address. It performs a reverse DNS lookup, which uses a PTR record to map an address back to a name. Enter an address in the browser to create and query the appropriate reverse DNS name.
For IPv4, the tool builds a name under in-addr.arpa; for IPv6, it builds a name under ip6.arpa. It then sends the DNS query through DNS-over-HTTPS. A network connection is required, and the result depends on the response available for that reverse DNS name. The available options can be adjusted, though their specific names and effects are not described here.
IP addresses and hostnames are used differently in DNS: an address identifies a network endpoint, while a hostname is a readable name. A reverse lookup can help when you have an address and want to check whether a PTR record associates it with a hostname. It does not perform the opposite, hostname-to-IP lookup.
The tool runs in your browser, but the address or hostname you enter is sent to a public DNS-over-HTTPS resolver to answer the query. My-DevTools itself stores nothing, but the lookup is not offline: it needs a network connection and cannot return an answer without reaching a resolver.
This browser-based lookup is useful for developers and DevOps engineers who need a quick reverse DNS check without installing a command-line client. It is free and can be used from the machine you have available.
Step 1: Paste or enter your input
Step 2: Adjust the options
Step 3: Copy the result
Use case: Handle a routine IP to Hostname (Reverse DNS) task without installing anything locally.
Use case: Get the job done in the browser, on whatever machine you happen to be at.
Use case: Reach a resolver from the browser instead of installing a command-line client for it.