What this checks
Availability is inferred from RDAP, the registries' structured registration protocol. When you enter a
full domain the checker asks whether a registration record exists for it: no record means the name is
almost certainly free to register, and an existing record means it's taken. Tick one or more of the
TLD boxes and enter just a base name, and it runs the same check across every selected extension in a
single request — a fast way to see where yourname.com, .io, and
.dev all stand at once.
Because the answer comes from the registry rather than a reseller's inventory, it reflects the underlying registration state, not a particular registrar's pricing or promotions. That makes it accurate for "is this name registered or not," with a few honest limits covered below.
How to read the results
A green Available badge means no registration was found and the name should be registrable right now. A grey Registered badge means the name is taken, and in single-domain mode it shows the current registration's expiry date so you can see how far off a possible drop is. An Unknown badge appears when a TLD doesn't support reliable RDAP availability checks — the lookup can't give a trustworthy yes or no for that extension rather than guessing.
In multi-TLD mode each row is one extension, checked independently, so a mix of available, registered, and unknown results across the row set is normal — especially for newer or niche TLDs whose registries vary in what they expose.
Availability isn't a reservation
An "available" result is a snapshot, not a hold. The name isn't yours until a registrar completes the registration and takes payment, and popular names can be claimed in the seconds between checking and buying.
- Registrar race. Availability can change the instant you look away. If a name matters, register it promptly rather than checking and coming back later.
- Premium and reserved names. Some names read as unregistered but are held back by the registry as premium (priced far above standard) or reserved entirely, so a registrar may still refuse or surcharge them.
- Parked and expiring names. A registered name that looks unused is still taken — parking isn't the same as being free. Watch the expiry date rather than assuming it's yours.
FAQ
Is an "available" result guaranteed?
No. It means the name was unregistered at the moment of the check. Registration is first-come, so someone else can take it before you complete checkout, and a registrar can still block a name it has flagged as premium or reserved. Treat "available" as a strong green light to act quickly, not a lock.
Why does a parked domain show as registered?
A parked page — those "domain for sale" or ad-filled placeholders — still has an active registration behind it, so it correctly shows as registered. Parking is a use of a domain someone already owns, not a sign the name is free. If you want it, you'd have to buy it from the current owner or wait for it to expire and drop.
What are premium domains?
Premium domains are names a registry has priced above the standard rate, usually short, common, or high-demand words. They can appear unregistered here because no one has claimed them, yet a registrar will quote a much higher price — sometimes a recurring premium renewal too. Always confirm the price at checkout before assuming standard rates apply.
Which TLD should a SaaS pick?
.com is still the default users type and trust, so grab it if you can. Failing that,
.io, .dev, and .app are well established in tech and read as
credible. Whatever you choose, secure the matching .com if it's affordable to prevent a
copycat from sitting on it — the point of checking several at once is to make that call with the full
picture.