TLD Checker - Check Domain Availability in All TLDs

Research domain availability with the TLD checker

Start your domain availability research by comparing your preferred name across 135 supported extensions. Our free TLD checker brings the results together in one search, helping you explore options for a new brand, business idea, or domain portfolio.

How to check your name across all supported TLDs

Enter the name without an extension. For example, enter gymNewYork rather than gymNewYork.com, then select Check TLDs. The tool checks that name across the supported extensions and groups the results for easy comparison.

Use letters, numbers, or hyphens within your name. Do not include spaces, a website address, or a path. You can try another name by replacing your entry and running a new search.

Which domain extensions can I check?

The checker covers 135 extensions, including .com, .net, and .org, alongside country and specialist extensions. It also includes multi-part endings such as .co.uk. This is a selected list, rather than every extension that exists.

Understanding your results

Activity detected means the check found signs that the domain is configured. No activity detected means the check found no such signs. Check inconclusive means a clear result could not be obtained; you can try again later.

These results help you research a name, but they do not confirm whether a domain is registered or available to purchase. Confirm availability with a registrar before purchasing.

Why compare domain availability across extensions?

Comparing extensions can help you research a new business name, explore alternatives to your preferred ending, or review other versions of a domain you own. Consider how easy the full name is to remember and whether the extension suits your audience.

What is a top-level domain?

A top-level domain, or TLD, is the final part of a domain name, such as .com in example.com. Domain extensions include general-purpose endings and country-code endings. Some commonly used endings combine multiple parts, such as .co.uk.

Is this TLD checker free?

Yes. You can check a name across the supported extensions for free, without creating an account.

Can I check a domain name I already own?

Yes. Enter your existing name without its extension to explore the other supported endings. For example, if you own gymNewYork.com, search for gymNewYork.

Can I register a domain here?

DNProbe helps you research domain names. To confirm current availability, pricing, and any registration requirements, check the full domain name with a registrar before purchasing.