Bulk Domain Availability Checker + WHOIS (RDAP) Lookup

Check whether domains are available or registered, in bulk, and get the registration details for the ones that are taken: registrar, creation date, expiry date, days until expiry, nameservers, and registry status codes. Free to use: you only pay Apify's small platform usage for the run.

It uses RDAP, the official replacement for WHOIS that registries now publish. That means structured data straight from the registry, no scraping of WHOIS text, and fewer rate-limit headaches than port-43 WHOIS lookups.

What you can do with it

• Check a brand name across TLDs. Give names like acme and TLDs like com, io, ai, dev, co, and see every combination at once.
• Bulk domain availability check. Paste hundreds or thousands of domains (plain domains or full URLs) and get available vs registered for each.
• Bulk WHOIS lookup. For registered domains, get registrar, created and expiry dates, and nameservers in one table you can export to CSV, Excel, or JSON.
• Find domains expiring soon. Set "Only return domains expiring within N days" to build a list of drops or to audit your own portfolio's renewals.

Output

Field	Meaning
domain	Normalized domain (punycode for international names)
status	available, registered, likely-available, or unknown
method	rdap (authoritative) or dns (fallback, see below)
registrar	Registrar name
createdAt, expiresAt, updatedAt	Registry event dates
daysUntilExpiry	Whole days until the expiry date
nameservers	Delegated nameservers
statusCodes	EPP status codes such as client transfer prohibited

How accurate is it?

For TLDs that publish RDAP (including .com, .net, .org, .dev, .ai and hundreds more), the answer comes from the registry itself: a registered domain returns its record, an unregistered one returns "not found". Some TLDs, such as .io, do not run an RDAP server. For those the Actor falls back to DNS and says so: method: dns, with status: likely-available and confidence: low when no delegation exists. A domain can be registered but not delegated, so confirm those at a registrar before you rely on them. Premium and reserved names can show as available here while a registrar still refuses or up-prices them.

If a registry rate-limits or times out after retries, the domain is reported as unknown with the reason, never guessed.

Try it

Press Start with no input. The run checks a small sample (two names across three TLDs, plus a well-known domain) so you can see the output shape in a few seconds.

FAQ

Is this a WHOIS lookup? Yes, in the modern form. RDAP carries the same registration data as WHOIS, in structured JSON, and is what ICANN now requires registries and registrars to provide.

How many domains per run? Up to 5,000. Registries rate-limit, so large runs are paced; very large lists finish faster split across a few runs.

Can AI agents call it? Yes, through Apify's MCP server, and the dataset is machine-readable.

---

More from Bridgeworks

We build small, dependable data tools for automations and AI agents: free demo runs, plain-English errors, honest pricing.

• Google Sheets Import & Export: push any Apify dataset into Google Sheets with service-account auth, so nothing expires mid-schedule.
• AI Brand Visibility Tracker: track what ChatGPT Search, Google AI Overviews, and Perplexity say about your brand.
• Greenhouse, Lever & Ashby Job Monitor: get events when a company adds, changes, or closes a job.