Check Domain

Search domain availability across multiple extensions, view WHOIS records, and compare registration vs. renewal prices in one place.

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checkdomain.ai

Verified Free tier

Quick facts
What is it	Search domain availability across multiple extensions, view WHOIS records, and compare registration vs. renewal prices in one place.
Pricing	Free
Free tier	Yes
Platform	Web Application
Best for	checking if a domain name is available before buying, comparing registration and renewal prices across registrars
Domain registered	2025

Data updated Sept. 19, 2026

What does Check Domain do?

Check Domain is a straightforward domain research tool that lets you search for domain names across dozens of extensions at once. Instead of checking each TLD one by one, you type in a name or full domain and see which extensions are available, registered, or for sale. The tool also pulls up WHOIS records and shows both the first-year registration price and the renewal cost side by side, so you know what you're really paying before you commit.

What sets Check Domain apart is its use of registry-backed RDAP queries rather than just DNS lookups. That means availability results are more reliable — less chance of a false positive. The interface is clean and fast: results appear as each registry responds, and you can click into any result for deeper details like registrar, important dates, nameservers, and the public WHOIS record. There's no account required, no search history saved, and no tracking cookies — just a simple, private lookup.

This tool is most useful for anyone buying a domain name — entrepreneurs brainstorming brand names, developers checking availability for a new project, or portfolio managers comparing costs across registrars. It's also handy for technical users who need quick WHOIS or RDAP data without digging through command-line tools. If you're tired of basic domain checkers that only show one extension or hide renewal prices, Check Domain gives you the full picture in one search.

Other Non-AI — Other

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Key features

What makes it stand out

Registry-backed RDAP checks for more reliable availability results than DNS-only lookups

Compare first-year registration price with renewal cost across multiple registrars

View WHOIS records including registrar, dates, nameservers, and registry source

Search multiple domain extensions (like .com, .net, .io, .ai) in a single query

No account, no search history, no tracking cookies — private and on-demand

Who is Check Domain for?

Who benefits most from this tool

checking if a domain name is available before buying

comparing registration and renewal prices across registrars

looking up WHOIS data for domain ownership and expiration details

Trust & presence

Domain Domain registered 2025

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