Help Me!

Find out whether a domain name is available

  1. Type the domain name in the large search box, for example mydomain.com. Leave out the extension and .com is used.
  2. Press Enter or Look up.
  3. The result appears under the search box: whether the name is available and, when it is not, who registered it, when it expires and which name servers it uses. The full WHOIS and RDAP records follow.

Find a domain name with an international or uncommon extension

Type in the domain name you are looking for (ex: mydomain.co.uk) and press Enter. International domain names can be typed in their own script, such as bücher.de.

Look up an IP address

Type an IPv4 or IPv6 address, such as 1.1.1.1 or 2606:4700:4700::1111, to see which network it belongs to, who holds it and where to report abuse.

Lookup and WHOIS through URL

If you want to integrate domain name search or WHOIS into your website, we've got you covered! Every lookup has an address of its own:

  • A domain name: https://ajaxwhois.com/domain/domain.extension
  • An IP address: https://ajaxwhois.com/ip/address

The addresses of the old site, https://ajaxwhois.com/?domain.extension and https://ajaxwhois.com/?a=whois&d=domain.extension, still work.

Frequently Asked Questions

How fresh are the results?

Every result is kept, opens straight away for everyone who looks up the same name, and says when it was checked. Registration details rarely change, so a result is only looked up again when you press Refresh, or when someone opens it more than 180 days after it was checked. If the registry does not answer, the result you had stays.

Why do I have to wait before a new lookup?

You can start one new lookup every 30 seconds. Results that are already here open without waiting. The registries limit how often they can be asked, and this keeps the site within those limits for everyone.

Why are the owner's name and address missing?

Most registries and registrars no longer publish the personal details of whoever registered a domain name, to comply with privacy laws such as the GDPR. The registrar named in the result can usually pass a message on to the owner.

What is the difference between WHOIS and RDAP?

Both are how registries publish who holds a domain name or an IP address. WHOIS is the original plain-text one. RDAP is its structured successor, and for many extensions it is now the only one. Ajax Whois asks both and shows you everything they return.

A name shows as available, so why can I not register it?

Some extensions only accept registrations from residents or organisations of a certain country, and some names are only sold at a premium price. The registrar you register with can tell you.

Do you register domain names?

No. Ajax Whois only looks them up. To register an available name, use any registrar that sells its extension.

Ask your questions, we'll post them here!