Look up any domain's registration details — registrar, creation and expiry dates, name servers — or check availability across popular extensions. Free, no sign-up.
Every registered domain leaves a public paper trail: which registrar manages it, when it was created, when it expires, and which name servers it points to. This tool reads that trail through RDAP, the modern successor to WHOIS, pulling data straight from each registry's authoritative server via IANA's official directory. No accounts, no API keys, no per-query fees.
The Availability tab checks your idea across .com, .net, .org, .io, .ai and .dev in one shot, and the Bulk Check tab handles up to 50 domains at once — handy when you're brainstorming brand names. If your first choice is taken, the tool suggests get-/try-/app- prefixed variants and alternate extensions to keep the search moving. One honest caveat: “no record found” means exactly that — some names are registry-reserved or premium even without a public record, so always confirm on a registrar before celebrating.
RDAP (Registration Data Access Protocol) is the modern replacement for the 40-year-old WHOIS protocol. Instead of raw text over TCP port 43, RDAP serves structured JSON over HTTPS, which makes it faster, machine-readable, and consistent across registries. This tool queries the authoritative RDAP servers listed in IANA's official bootstrap registry.
It means no registration record exists in the RDAP directory — but that is not a guarantee the name is available. Registries can reserve names, mark them premium, or block them for policy reasons without publishing a record. Always confirm availability and pricing on a registrar's website before assuming a domain is purchasable.
“Unknown” means we couldn't get a definitive answer: the registry rate-limited us, its server errored, the query timed out, or the TLD has no RDAP server listed. We deliberately never report these as available — a wrong “available” is worse than no answer. Wait a moment and retry.
Your search terms are sent to our server, which forwards them to public RDAP directory servers — the same public records anyone could look up. We don't require an account and we don't sell query data. Note that RDAP itself is a public-record protocol, so lookups are inherently not anonymous to the registries.
Any TLD with an RDAP server in IANA's bootstrap registry — that covers .com, .net, .org, .io, .ai, .dev and hundreds more. If a TLD has no RDAP endpoint (some country-code registries still don't), the tool will tell you instead of guessing.