---
url: "https://indiehunt.io/tools/domain-name-checker"
markdown: "https://indiehunt.io/tools/domain-name-checker.md"
type: "website"
title: "Free Startup Domain Checker (.com, .io, .ai)"
---

# Free Startup Domain Checker (.com, .io, .ai)

> Check if a startup name is registered on .com, .io, .co, .app, .dev, and .ai via official RDAP. Free, no signup. Available is a hint, not a guarantee.

## Domain name checker

Enter one product name, such as launchly. The server checks .com, .io, .co, .app, .dev, and .ai.

It loads the IANA RDAP bootstrap (https://data.iana.org/rdap/dns.json), caches it, and queries only that TLD’s RDAP base URL at /domain/name.tld. It does not accept a URL from the form.

- HTTP 404: likely available

- HTTP 200: registered. Registrar and registration date are shown when RDAP includes them.

- Anything else, including a timeout: couldn’t check

- No RDAP server in the bootstrap: can’t check via RDAP. The tool does not guess with WHOIS.

Likely available is a strong hint, not a guarantee. The registrar has the final say.

## Domain name checker FAQ

### Does likely available mean I can register the name?

No. HTTP 404 from the TLD’s RDAP server is a strong hint, not a guarantee. The registrar has the final say.

### Which endings does this check?

.com, .io, .co, .app, .dev, and .ai. If the IANA bootstrap has no RDAP server for an ending, the result says so.

## Related links

- [Open the domain name checker](https://indiehunt.io/tools/domain-name-checker)
- [Launch tagline generator](https://indiehunt.io/tools/launch-tagline-generator)
- [Submit a project](https://indiehunt.io/submit)
- [View pricing](https://indiehunt.io/pricing)

## Links

- HTML version: https://indiehunt.io/tools/domain-name-checker
- Markdown: https://indiehunt.io/tools/domain-name-checker.md
- Site index: https://indiehunt.io/llms.txt


_HTML version: https://indiehunt.io/tools/domain-name-checker_