TLD List: Domain Name Checker

TLD List explains every domain extension and tells you, straight from the registry, whether the name you want looks taken.

Explore 1,436 extensions
Browse the full IANA root zone list, from .com and .ai to country codes and international endings. 141 extensions carry a plain-language meaning, the registry that runs them, the launch year, who can register and a typical yearly price range. Search by name, country or topic, filter by gTLD, ccTLD, new, two-letter or international, sort by price or length, and star your favorites. The list works offline.

Check a name
Type a name and the app asks the registry's public RDAP service for each extension you pick, one lookup at a time with a short pause. You get "likely available", "registered" or "unknown", and for registered names the registrar, registration date and expiry date. Owner contact data is never read. Names with accents are converted to punycode before they are sent, so names with accents work too.

Name ideas
Type a word or two and get prefix, suffix and blend ideas plus domain hacks such as inven.to. The generator uses plain rules, the same input always gives the same list, and it can check the whole batch for you.

Compare
Put two to four extensions side by side: type, typical price, registry, launch year, restrictions, length and whether availability checks are supported.

Watchlist
Keep the names you like. Re-check one or all of them whenever you want and see when each was last checked and when a registered name expires. Nothing runs in the background.

Good to know
- "Likely available" is not a reservation. Registries can hold premium or reserved names that still answer as unregistered, and a name can be taken minutes after you check.
- Some extensions do not publish an RDAP service. Those show "unknown" instead of a guess.
- Prices are indicative ranges from tldlist.us with a date, not live registrar prices.
- No account and no tracking. Favorites and the watchlist stay on your device. The domain names you check are sent over HTTPS to the registry that runs that extension.

Sources
Extension list and RDAP service list: IANA (iana.org). Meanings, registries and typical prices: tldlist.us (CC BY). TLD List is an independent reference app. It is not affiliated with IANA, ICANN, any registry or any registrar, and it does not sell domains.