Check Domain is built for the moment between having a name idea and paying a registrar. Instead of a single yes/no answer, it fans a search out across popular extensions — .com, .net, .org, .io, .ai and others — and returns availability for each, so you can see whether your brand reads well on more than one suffix before committing. Availability comes from each registry's RDAP service rather than a DNS guess, which removes the false confidence that a quick DNS lookup can create.
When a name is already registered, the tool surfaces the public record: registrar, key registration and expiry dates, nameservers, and the registry source. Alongside that record it places the two prices that actually matter to buyers — the discounted first-year registration offer and the ongoing renewal cost — so the cheapest headline price is not mistaken for the cheapest long-term choice.
There is no sign-up, no saved search history and no tracking cookies in this version; queries are processed on demand. That makes it a lightweight utility for founders naming a product, developers auditing a domain before a purchase, or portfolio owners checking a buy across several extensions. The tool is transparent that availability is only authoritative at the registrar's checkout, so it positions itself as research rather than a guarantee.
