Domain Availability Checker – Bulk Domain Name Checker

Check if domains are free to register, one or 50,000 at once. The answer comes from each registry's own RDAP service (the official successor to WHOIS), not from a reseller's cache. Paste:

• Domains such as example.com or shop.co.uk. URLs, subdomains and email addresses are reduced to the domain.
• Plain names such as mybrand. A name is tried in every TLD you choose: .com, .net, .org, .io, .ai, .co, .app and .dev by default, or any others (.no, .de, .shop, .co.uk ...).

For each domain you get:

• available: true or false, and a status: available, registered or likely_available.
• For taken domains: registrar, creation date, expiry date, days to expiry, name servers and the registry status. pending delete or redemption period means the domain may soon be free again.

Built for naming a startup or product, domain investors, brand protection (which spellings of your name are still free) and agencies checking client domains.

Example output rows

{"domain": "rowfeedlabs.io", "name": "rowfeedlabs", "tld": "io", "available": true, "status": "available", "checked_via": "registry RDAP"}
{"domain": "apify.com", "name": null, "tld": "com", "available": false, "status": "registered", "checked_via": "registry RDAP",
 "registrar": "...", "created": "2015-...", "expires": "...", "days_to_expiry": 400,
 "registry_status": ["client delete prohibited", "client transfer prohibited"], "name_servers": ["..."]}

How to use

1. Click Try for free (or Start) at the top of this page to open the input form.
2. Fill in Domains or names. Up to 50,000 domains (example.com) or plain names (mybrand). The form comes with a working example, so you can also run it as it is.
3. Optional: adjust TLDs to try for plain names. Every field has a sensible default.
4. Click Start and wait for the run to finish.
5. Download the results as Excel, CSV or JSON from the Output tab, or get them through the Apify API, a schedule or an integration (Make, Zapier, Google Sheets ...).

Pricing

Pay per event, no subscription:

• $0.0004 per domain checked ($0.40 per 1,000).
• $0.001 per run start.

Checks that get no answer, and text that is not a domain or name, are free. Works on the free Apify plan.

Input

Field	What it does
domains	Domains or plain names, up to 50,000. Acme Corp becomes the name acmecorp.
tlds	Endings to try for plain names, e.g. com, io, no, co.uk. Leave empty for the 8 defaults.

Good to know

• Available means not registered at the registry. Some names are reserved or sold as premium by the registry at a higher price, and some country TLDs (.no, .eu, .us ...) only sell to local people or companies. Your registrar shows the final price when you buy.
• A few TLDs publish no RDAP (for example .de, .co, .eu, .es, .it, .se, .jp). There the check uses DNS: a domain with name servers is registered, one not found in DNS is likely_available, because a registered domain without name servers looks the same.
• When the registry has no record yet but the domain already has name servers (registered minutes ago), it is reported as registered.

More tools from Rowfeed

• WHOIS Lookup & DNS Checker – domain age, expiry, registrar and SSL expiry of taken domains.
• DNS Lookup – all DNS records, reverse DNS and DNS host of any domain.
• Domain History Checker – what a domain was used for before you buy it.
• Website Technology Checker – which CMS, analytics and tools a website uses.