Ever wondered who owns a website, when its domain expires, or which company it's registered through? All of that information is public, and you can find it in seconds with a WHOIS lookup. Whether you're buying a domain, investigating a suspicious site, or checking whether your own registration is about to lapse, WHOIS is the tool that tells you where a domain is registered and who's behind it. Here's how to check, and how to read what you find.

What is WHOIS?

WHOIS (pronounced "who is") is a public database that stores registration information for every domain name. When someone registers a domain, details about that registration — the registrar, the dates, the nameservers, and contact information — are recorded and made queryable. A WHOIS lookup simply asks that database, "what do you know about this domain?"

It's separate from DNS. DNS controls where a domain points (its website and email), while WHOIS records who registered it and when. For the DNS side of things, see our guide on how to look up DNS records for any domain — WHOIS answers the ownership and registration questions instead.

What a WHOIS lookup shows you

Run a WHOIS lookup and you'll typically see:

  • The registrar — the company the domain was registered through (such as GoDaddy, Namecheap, or Cloudflare).
  • Registration date — when the domain was first created, which tells you how old (and often how established) it is.
  • Expiry date — when the registration lapses unless renewed. This is one of the most useful fields.
  • Last updated date — when the record last changed.
  • Nameservers — the servers handling the domain's DNS, which often reveal its hosting or DNS provider.
  • Domain status codes — technical flags like clientTransferProhibited that show whether the domain is locked against transfers.
  • Registrant contact — the owner's name and details, if they aren't hidden by privacy protection (more on that below).

How to check where a domain is registered

You don't need any special software. The easiest way is a free online WHOIS tool: enter a domain, and it queries the WHOIS database and returns the registration details instantly.

Our free WHOIS Lookup tool does exactly that — type in any domain and it shows you the registrar, key dates, nameservers and available owner information in one clean view. It's the fastest way to check a domain's registration from any device, with no account or command line needed.

Why check a domain's registration?

A WHOIS lookup answers a surprising number of practical questions:

  • Is my domain about to expire? Checking the expiry date is the simplest way to avoid the nightmare of an accidentally lapsed domain (and the outage that follows).
  • Who owns this domain? Useful if you want to buy a domain that's already taken, or contact the owner.
  • Is this site legitimate? A domain registered only days ago is a common red flag for scam and phishing sites — the registration date helps you judge trustworthiness.
  • Which registrar and host is it on? The registrar and nameservers reveal the providers behind a site.
  • Is a domain available? If WHOIS returns "no match," the domain likely isn't registered yet.

Why some WHOIS information is hidden

Don't be surprised if the owner's name and contact details are replaced with something like "Redacted for Privacy" or a privacy-service address. Since privacy regulations such as GDPR came into effect, most registrars automatically hide personal registrant details to protect owners from spam and misuse. Many people also pay for WHOIS privacy protection, which substitutes the registrar's proxy details for their own.

This is normal and doesn't mean anything is wrong — the registrar, dates, nameservers and status information almost always remain visible, which is usually all you need to answer the important questions.

When a domain has expired

One of the most valuable uses of WHOIS is diagnosing a site that's suddenly gone dark. If a website won't load at all and its DNS has stopped resolving, an expired domain is a prime suspect — and the WHOIS expiry date confirms it instantly. This is a classic cause behind errors like DNSPROBEFINISHEDNXDOMAIN, and it's one of the checks in our guide on diagnosing why one website won't load.

If you're not sure whether a site is down because of an expired domain or something else, run it through our live website down checker first — if the domain no longer resolves for our servers either, a WHOIS lookup will quickly tell you whether it simply expired.

Tip: check your own domain before it lapses

If you own a domain, it's worth running a WHOIS lookup on it once in a while and noting the expiry date. An expired domain can take your website and email offline instantly, and recovering a lapsed domain can be stressful (and occasionally expensive if someone else grabs it). Turn on auto-renew with your registrar, keep the billing card on file current, and make sure the registrar's renewal reminders go to an inbox you actually check. A 30-second WHOIS check is cheap insurance against a very avoidable outage.

The bottom line

Checking where a domain is registered takes seconds and reveals a lot: the registrar, the registration and expiry dates, the nameservers, and — privacy permitting — the owner. Use a free WHOIS Lookup to pull all of it up instantly, whether you're guarding your own domain against expiry, vetting an unfamiliar site, or tracking down who's behind a domain you'd like to buy. It's a small tool that answers some of the most important questions about any website.