Free tool
Domain Availability Checker
Type the domain name you want and see right away if it is taken or looks free. The check runs in your browser against the public RDAP registry service. No sign-up, no paid API, and nothing is saved.
How to use this tool
- Type a nameEnter the domain you want, with or without the ending. Without one, we check .com and .net.
- Read the resultTaken, looks available, or could not check. A check that fails tells you nothing about the name itself.
- Confirm before you commitNames change hands fast. When one looks available, confirm and register it at your registrar right away.
What this check can and cannot tell you
- Source. Registry data from RDAP: Verisign for .com and .net, and the rdap.org bootstrap for other endings. We never use a paid lookup.
- Looks available is not owned. A domain with no record can still be reserved, restricted or sold to someone else before you buy it.
- Trademarks. A free name can still be too close to another company. Search the name before you print it on a truck.
- Privacy. The request goes from your browser to the registry. We do not see the names you type.
Frequently asked questions
How does the checker know if a domain is taken?
It asks the public RDAP service for that domain, straight from your browser. RDAP is the open successor to WHOIS that registries run. If the registry has a record, the name is taken. If it reports no record, the name looks available. Nothing is sent to us.
Is 'looks available' a guarantee I can register it?
No. It means the registry has no registration record right now. Some names are reserved, held for sale or taken by someone else a minute later. Treat it as a strong hint, then confirm and register the name at the registrar you choose.
Why does it say 'Check manually' for some endings?
Free RDAP lookups work for .com, .net and many other endings, but a few registries, such as those behind .io and .us, do not offer a public RDAP service we can query. Rather than guess, we show a link to the ICANN lookup so you can check it there.
What if the result says 'Could not check'?
The lookup service may be busy, your network may block it, or the request timed out after eight seconds. None of those say anything about the name. Wait a minute and try again, or use the ICANN lookup link shown with the result.
Which ending should a local HVAC company use?
A .com is the safest choice because customers type it by habit and it is easy to say over the phone. If your exact name is taken, adding your city or trade, like smithhvac or smithaustinhvac, usually beats switching to a less familiar ending.