Is the name still available?
Type a business name and this checks a dozen domain endings at the same time, against the registries themselves rather than a reseller's list. No account, nothing stored, and no upsell.
Twelve endings, checked at the same time. Nothing is stored.
What this can and cannot tell you. It asks each registry whether a registration record exists. No record is a good sign and not a promise: a name can be reserved, held back by the registry, premium priced, or taken between this check and your checkout. A registered domain also says nothing about whether the trademark is free. Anything that does not answer in time is marked so, rather than counted as available.
Questions people ask
How do I check whether a domain name is available?
This page asks the domain registries directly through RDAP, the protocol that replaced WHOIS, and reports whether a registration record exists for each ending. No record means nobody has registered it. A registrar's checkout is still the only place that can hold a name for you.
Does an available domain mean the business name is free to use?
No. Domain registration and trademark are separate things. A name can be free as a domain and already owned as a mark in your industry, or registered as a domain by somebody with no claim to the name at all. Checking the trademark register is a separate step.
Why do some endings take longer to answer?
Each ending is run by a different registry and they answer at very different speeds. In testing one came back in two milliseconds and another took over sixteen seconds. Every ending here is checked at the same time rather than in a queue, so a slow one does not hold up the rest.