How to use MX Lookup
- Give MX Lookup a domain name to work with.
- Press the button and MX Lookup sends the DNS query from your browser.
- See the response from a public DNS resolver; MX Lookup only displays what comes back.
About this tool
MX Lookup runs as a page in your browser. MX Lookup performs genuine DNS lookups over DNS-over-HTTPS against a public resolver, with no server of ours in the path.
The results are real query responses, not cached or invented values. The DNS query is sent from your browser to a public DNS-over-HTTPS resolver; this site has no backend and never sees it. A network connection is required, so it does not work offline.
Frequently asked questions
What is MX Lookup for?
MX Lookup resolves the DNS records you ask for by querying a public DNS-over-HTTPS resolver directly from your browser.
Do I need an account for MX Lookup?
No — MX Lookup needs no account, sign-up or installation.
Does MX Lookup contact a server?
Yes — MX Lookup queries a public DNS-over-HTTPS resolver from your browser. This site has no backend and never sees the query, but the public resolver does, and a connection is required.