Bulk WHOIS Lookup and Domain Availability Checker (RDAP, the WHOIS successor)

A bulk WHOIS lookup, domain availability and domain expiry checker: check thousands of domains in one run. For each one you get whether it is available or registered, the registrar, creation and expiry dates, days until expiry, domain age, status codes (for example client transfer prohibited, redemption period), nameservers and DNSSEC.

It uses RDAP, the structured JSON protocol that replaced WHOIS for gTLDs in 2025, and routes each domain to its official registry through the IANA bootstrap list (1,200+ TLDs). No WHOIS text parsing, no guessing.

USD 2.50 per 1,000 domains. Invalid domains, and TLDs whose registry has no RDAP service, are reported free.

What people use it for

• Name ideas. Paste 500 candidate names and turn on Only return available domains.
• Expiring-domain watch. Schedule a list weekly and sort by daysUntilExpiry.
• Portfolio audits. Check the registrar, expiry, transfer locks and DNSSEC on every domain you own or manage.
• Lead scoring and fraud checks. Domain age is a strong signal. Brand-new domains get flagged.
• Brand protection. See who registered look-alike domains, and when.

Sample output

{
  "domain": "google.com",
  "tld": "com",
  "registered": true,
  "available": false,
  "registrar": "MarkMonitor Inc.",
  "registrarIanaId": "292",
  "createdAt": "1997-09-15T04:00:00Z",
  "updatedAt": "2019-09-09T15:39:04Z",
  "expiresAt": "2028-09-14T04:00:00Z",
  "daysUntilExpiry": 716,
  "domainAgeDays": 10606,
  "status": ["client delete prohibited", "client transfer prohibited", "client update prohibited", "server delete prohibited", "server transfer prohibited", "server update prohibited"],
  "nameservers": ["ns1.google.com", "ns2.google.com", "ns3.google.com", "ns4.google.com"],
  "dnssec": false
}

An unregistered name returns "registered": false, "available": true.

How to use it

1. Put domains or URLs in Domains, one per line. https://www.example.com/page becomes example.com. Duplicates are removed.
2. Optionally turn on Only return available domains.
3. Click Start. Export as CSV, JSON or Excel, or use the Apify API, Make, Zapier or n8n.

Pricing

What	Price
Domain looked up (registered or available)	USD 0.0025 (USD 2.50 per 1,000)
Invalid domain, or TLD without RDAP	Free

With Only return available domains on, you pay only for the available ones.

Limits

• The actor identifies itself. Every request carries the user agent Mozilla/5.0 (compatible; domain-rdap-lookup/1.0; +https://apify.com/JTPalms/domain-rdap-lookup), with plain request headers. It never pretends to be a browser. Some sites block bots; a blocked request is reported as an error, not hidden.
• Some country-code TLDs (for example .io) do not run a public RDAP service. Those come back with a clear error and are not charged.
• available: true means the registry has no record. Premium, reserved or blocked names can still be restricted at the registrar.
• Registrant names, emails and addresses are not returned. Registries mostly redact them anyway, and this actor does not collect personal data.
• Registries rate-limit. The defaults stay well within typical limits. For lists above 50,000, add a proxy under Advanced.

Related actors

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FAQ

Why RDAP and not WHOIS? ICANN retired the WHOIS requirement for gTLD registries and registrars in January 2025. RDAP returns standardized JSON with real dates and status codes, so results are consistent across registries.

Is it legal? RDAP is the official public lookup service that registries run for exactly this purpose. Lookups are made at polite rates.

Something wrong for a TLD? Open an issue with an example domain.