Formula and assumptions
DNS over HTTPS (RFC 8484) · Cloudflare 1.1.1.1 → Google 8.8.8.8Look up A, AAAA, MX, TXT, NS, CNAME, SOA and CAA records for any domain. The query goes from your browser to public DNS (Cloudflare or Google).
DNS lookup
A, MX, TXT, NS and more records for any domain.
DNS lookup
Fields contain editable examples.
How do I see the MX records of a domain?
Choose the MX type and look up the domain: you will see each mail server with its priority, and the lowest number is tried first. For example, gmail.com publishes several gmail-smtp-in.l.google.com servers.
Calculation assumptions
Look up A, AAAA, MX, TXT, NS, CNAME, SOA and CAA records for any domain. The query goes from your browser to public DNS (Cloudflare or Google).
How to use this calculator
Check what a domain publishes in DNS before migrating email, a website or a certificate. Enter the domain (a URL or email address also works) and choose the type: A and AAAA for websites, MX for email, TXT for verifications and SPF, NS to see who manages the zone and CAA to see which authorities may issue certificates.
Worked example
- Enter gmail.com and choose the MX type.
- The query travels encrypted over HTTPS from your browser to Cloudflare DNS, or to Google Public DNS if Cloudflare does not answer.
- The table lists each record with its TTL: the number of seconds other servers may cache it.
Interpreting the result
If you just changed a record and still see the old value, wait for the previous TTL to expire: public resolvers may keep it cached. NXDOMAIN means the name does not exist; an empty table means the name exists but has no records of that type. When you query a subdomain with a CNAME, the alias is shown too.
Frequently asked questions
Why do I see a different value from my DNS panel?
Resolvers keep the answer for the TTL. Wait that long or query the NS servers of your provider directly.
What does TTL mean?
The time in seconds a resolver may reuse an answer without asking again. Low TTLs speed up changes; high TTLs reduce queries.
Do you store the domains I look up?
No. The query goes from your browser straight to Cloudflare or Google; CalculaIT does not receive or log the domain.