DNS Lookup

Look up A, AAAA, MX, CNAME, TXT, NS, and SOA records for any domain.

Diagnose more than DNS

RankRebel gives freelancers and small agencies enterprise-grade SEO intelligence without enterprise prices.

Start for $7

About the DNS Lookup tool

DNS is the internet’s address book: it maps a human-friendly domain like example.com to the servers that actually answer for it. A DNS lookup queries those records directly so you can see where a domain points, which mail servers handle its email, and which values verify it to third-party services.

This tool queries authoritative nameservers from our servers and returns the live records — A and AAAA for addresses, MX for mail, CNAME for aliases, TXT for verification and SPF, NS for the nameservers themselves, and SOA for the zone’s master record.

How to use it

  1. Enter a domain (for example, example.com) — leave off http:// and any path.
  2. Press Look up. We query authoritative nameservers and group the results by record type.
  3. Read the records you need: A/AAAA to confirm where the site resolves, MX to check mail routing, TXT for SPF and domain-verification strings.
  4. If a record is missing or wrong, update it at your DNS provider — then re-run the lookup to confirm the change has propagated.

Why it matters for SEO

  • A misconfigured A or CNAME record can point your domain at the wrong server, taking the whole site — and your rankings — offline until it is fixed.
  • Missing or malformed TXT records break SPF, DKIM, and domain verification, which can send your email to spam and block tools like Search Console from verifying ownership.
  • When you migrate hosts or change CDNs, checking DNS confirms the cutover actually happened before search crawlers hit a dead address.
  • MX record problems quietly stop email delivery, which matters for any site that relies on contact forms, receipts, or outreach.

Frequently asked questions

What is a DNS record?

A DNS record is a single instruction in a domain’s zone that maps the domain to a value — an IP address (A/AAAA), a mail server (MX), an alias (CNAME), or a text string (TXT). Together these records tell the internet how to reach and verify your domain.

How long do DNS changes take to propagate?

It depends on the record’s TTL (time to live). Changes can appear in minutes but may take up to 24–48 hours to update everywhere. Because this tool queries authoritative nameservers directly, it usually reflects changes sooner than your local resolver.

What is the difference between an A record and a CNAME?

An A record points a name straight at an IPv4 address, while a CNAME points one name at another name (an alias) that is then resolved to an address. Use A for a root domain and CNAME for subdomains that should follow another host.

Is this DNS lookup tool free?

Yes — it is completely free with no sign-up. Queries run from our servers against authoritative nameservers, so results are not skewed by your local DNS cache.

HomeFeaturesPricing

TOOLS:

SERP PreviewKeyword DensityMeta Tag Analyzerllms.txt CreatorHeading CheckerSchema CheckerSchema GeneratorRobots.txtIs It Down?DNS LookupSSL CheckerHTTP Header CheckerFind Meeting Time

© 2026 Code Shock, LLC