DNS & domain lookup

Domain Availability Checker

Check if a domain name is available to register across popular TLDs (.com, .io, .ai and more) using authoritative RDAP data. Free and instant.

Check domain availability

Enter a name or domain. We check it across the most popular TLDs.

What this availability checker does

Checks a name across 10 popular TLDs at once
Uses RDAP for authoritative registration data
Distinguishes available, taken and unknown
Routes ccTLDs to their authoritative server
Only decides on genuine RDAP responses
Runs live — no cached or guessed results

Common use cases

  1. 1Brainstorming a name across many extensions
  2. 2Checking if your brand is free on .com, .io, .ai
  3. 3Finding an available alternative TLD
  4. 4Verifying a domain before you buy it
  5. 5Grabbing matching domains for a launch
  6. 6Vetting a name for a new product

Related tools

WHOIS LookupDomain Age CheckerDomain Expiration CheckerSubdomain FinderDNS Record LookupNS Record Lookup

About domain availability

A domain is available if no one has registered it yet. This checker queries RDAP — the authoritative registration protocol — and only reports "available" when a registry genuinely returns "not found", so it avoids the false positives that catch out simple WHOIS scrapers.

Some ccTLDs do not publish RDAP; for those the result is shown as unknown rather than guessed. When a name is free across the extensions you care about, register it promptly — good names go fast.

More Free Tools Where This Came From

This utility is one of dozens of free, no-login tools for DNS, email, SEO and developers — all instant and private.

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HostCloud.in  ·  Pune, India  ·  Serving 34,987+ Websites Since 2020

FREQUENTLY ASKED QUESTIONS

Got Questions? We Have Answers.

How does the availability checker work?

Enter a name or domain and it queries RDAP for that name across popular TLDs, reporting each as available, taken or unknown based on genuine registry responses.

Why is a result shown as "unknown"?

Some ccTLDs do not operate an RDAP server. Rather than guess, the tool reports "unknown" so you are never given a false "available".

Which TLDs does it check?

Common ones including .com, .net, .org, .io, .co, .ai, .app, .dev, .xyz and .in — plus the exact domain if you type a full one.

Is an "available" result guaranteed?

It reflects the registry at query time. Availability can change quickly, so register a name you want promptly to be sure.

Can I check a specific domain only?

Yes. Type the full domain (like mybrand.com) and it is checked directly, along with the same base name on other TLDs.

Does this register the domain?

No. It only checks availability. Register available names through a registrar such as HostCloud.