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DNS Lookup – Check A, AAAA, MX, NS, TXT & CNAME Records

Look up the DNS records of any domain: A, AAAA, CNAME, MX, NS, TXT, SOA and CAA, with TTLs. Reverse DNS for IP addresses. Free and instant.

  • Free, no sign-up
  • Checked from our server, nothing stored

About the DNS Lookup

See exactly how a domain is set up: which server it points to, which mail servers receive its email, its name servers, and the TXT records used for SPF, DKIM and site verification. Enter an IP address for a reverse (PTR) lookup.

Key features

  • A, AAAA, CNAME, MX, NS, TXT, SOA, CAA
  • TTL for address records
  • Reverse DNS (PTR) for IPs
  • Public resolvers: Cloudflare, Google, Quad9
  • Choose which record types
  • Copy any record set

Check how a domain is set up

DNS (the Domain Name System) turns names like example.com into the addresses computers use. A lookup shows where a website is hosted, where its email goes and which records prove ownership to services like Google.

DNS record types

RecordWhat it doesExample
APoints to an IPv4 address93.184.215.14
AAAAPoints to an IPv6 address2606:2800:21f:cb07::1
CNAMEAlias to another namewww → example.com
MXMail servers for the domain10 mail.example.com
NSServers that hold the domain's DNSns1.cloudflare.com
TXTText for SPF, DKIM, DMARC, verificationv=spf1 include:_spf.google.com ~all
SOAPrimary server, contact and timers–
CAAWhich CAs may issue SSL certificates0 issue "letsencrypt.org"

Common checks

  • Website not loading after a move: check the A record shows the new server's IP.
  • Emails not arriving: check there are MX records, and an SPF TXT record.
  • SSL certificate won't issue: check CAA records allow your certificate authority.

WHOIS lookup, SSL checker and What is my IP.

How to use the DNS Lookup

  1. Enter a domain name or URL, such as example.com.
  2. Click the button, or try one of the examples.
  3. Our server runs the check and shows the results in a few seconds.
  4. Copy the results, or share the page link, which includes your query.

Frequently asked questions

Why doesn't my DNS change show up yet?

Resolvers cache records for the TTL (time to live) set on them, often 1 to 24 hours. Until that time passes, some people still get the old answer. Lower the TTL a day before planned changes.

How do I check my SPF or DKIM record?

Look up the TXT records of your domain for SPF (starts with v=spf1). For DKIM, look up TXT records of selector._domainkey.yourdomain.com, using the selector your email provider gives you.

What's the difference between A and CNAME?

An A record points a name straight to an IPv4 address. A CNAME makes a name an alias of another name, which is then looked up in turn. The bare domain (example.com) can't normally be a CNAME.

Which DNS servers do you use?

Cloudflare (1.1.1.1), Google (8.8.8.8) and Quad9 (9.9.9.9), so you see the public answer rather than one cached by your own internet provider.

Are these network tools free?

Yes. All tools are free with no sign-up. To keep them fast for everyone, each visitor can run about 30 checks of each kind every five minutes.

Do you store the domains I check?

No. Lookups are run on demand and the results aren't saved. Your own IP address isn't stored either.

Where do the results come from?

DNS lookups query public resolvers (Cloudflare, Google and Quad9), WHOIS data comes from each registry's official RDAP or WHOIS service, and SSL and HTTP checks connect to the website directly from our server.

Can I check sites on my local network?

No. For security, our server only connects to public internet addresses, so localhost, 192.168.x.x and other private addresses are refused. The subnet calculator works with any address because it runs in your browser.

Last updated:

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