Domain Name Checker - Instant Availability Lookup

Your ideas stay private. Lookups go directly from your browser to Cloudflare's public DNS resolver. No domain names are sent to our servers, logged, or tracked. This page works offline for UI — lookups need a network connection.
Enter a domain with or without extension. Press Enter or click Check.

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Bulk check

One domain per line. Check up to 100 at once.

How it works

This tool queries DNS NS (nameserver) records via Cloudflare's DNS-over-HTTPS API directly from your browser. Every registered domain has nameserver records. If a domain returns no NS records (NXDOMAIN), it is very likely available for registration.

Privacy

Unlike most domain checkers, this tool sends zero data to our servers. The DNS query goes directly from your browser to Cloudflare's public resolver (1.1.1.1) — the same resolver your browser may already use. No domain names you check are logged, tracked, or visible to us. Your ideas stay yours.

Accuracy

DNS-based checks are approximately 95% accurate. A small number of domains may show as available when they are actually reserved, premium-priced, or in a redemption grace period. Always confirm availability at your preferred registrar before purchasing.

Popular domain extensions

General

  • .com — Commercial (most popular)
  • .net — Network / general use
  • .org — Organizations
  • .info — Informational

Tech

  • .dev — Developers (HTTPS only)
  • .io — Tech startups
  • .app — Applications (HTTPS only)
  • .sh — Shell / scripts

Other

  • .co — Company / short alternative
  • .me — Personal sites
  • .xyz — Generic / affordable
  • .ai — AI companies