Domain name availability checker (DNS lookup)
Heuristic only — not authoritative. Checks for an A record via Cloudflare DoH. NXDOMAIN often means unregistered, but registered domains can have no A record (parked, MX-only, NS-only). For a definitive answer use a registrar WHOIS / RDAP lookup.
About this tool
Domain name availability checker (DNS lookup) is a single-purpose utility on instant.tw, a free toolbox of calculators, converters, generators, and quick lookups. Everything works in your browser — nothing is uploaded, nothing is stored on a server unless explicitly noted.
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