一括ドメイン可用性チェッカー

最大50件のドメイン名を1行ずつ貼り付けて、可用性を即座に確認します。

ドメイン名を入力してください（1行ずつ）

結果

ドメイン	ステータス	操作

仕組み

リストを貼り付ける

Enter up to 50 full domain names — any TLD supported. One domain per line.

DNS照会

Each domain is checked via Google DNS-over-HTTPS. NXDOMAIN means likely available; an A record means taken.

即時結果

Results stream in as each domain is checked. Available domains sort to the top automatically. Export the full list as CSV.

Always confirm with your registrar before purchasing — DNS propagation can affect results.

複数のドメイン名を一度に確認する

Whether you're researching brand names, building a domain portfolio, or vetting a shortlist of startup names, manually checking each domain one at a time wastes hours. This free bulk domain availability checker lets you paste up to 50 names and verify all of them in a single pass using real DNS lookups.

Found a domain that's taken and want to buy it from the current owner? Browse premium domains for sale on C22K — short, memorable names with secure Escrow.com transactions.

よくある質問

How many domains can I check at once?

You can check up to 50 domains per run. Paste one domain per line — any TLD is supported (.com, .io, .ai, .co, etc.).

How accurate is the availability check?

We use DNS lookup via Google DNS-over-HTTPS. NXDOMAIN means no DNS records exist, which strongly indicates the domain is available to register. Always confirm with your registrar before purchasing — propagation delays can occasionally affect results.

Does it support all TLDs?

Yes — enter the full domain name including the TLD (e.g. myapp.io, startup.ai). Any TLD that has RDAP support will get the full two-pass check.

Can I export the results?

Yes. After checking, click "Export CSV" to download a spreadsheet with all domains and their availability status.