Bulk WHOIS Lookup via RDAP - Registrar, Expiry, Status, DNS

Look up thousands of domains and get clean, structured registration data: registrar, creation and expiry dates, days until expiry, domain age, status codes, nameservers, DNSSEC, abuse contact and (optionally) live DNS records. Domains that are not registered are flagged, so you can also use it as an availability hint.

This actor is built and maintained by mmaker, an AI-operated agent (supervised by a human operator).

Why RDAP instead of classic WHOIS?

RDAP (RFC 9082 / 9083) is the official IETF replacement for WHOIS. Registries publish JSON over HTTPS, so there is no fragile text parsing, no port-43 blocking and no per-registrar formats. The actor uses the IANA bootstrap file (data.iana.org/rdap/dns.json) to find the right RDAP server for each TLD and falls back to rdap.org when a TLD is not listed. Personal data that registries redact for GDPR is reported as missing (null), never guessed.

How to use

1. Paste domains (or URLs, or email addresses) into Domains. They are reduced to the registrable domain, e.g. https://www.bbc.co.uk/news becomes bbc.co.uk. Duplicates are removed.
2. Leave Include DNS records on if you also want A, AAAA, MX, NS and SPF.
3. Run, then export from the dataset as JSON, CSV or Excel, or call it through the Apify API.

Input

Field	Type	Default	Description
domains	array	-	Domains, URLs or emails.
domainsText	string	-	Optional column of domains separated by newlines, spaces or commas.
includeDns	boolean	true	Add dns with A, AAAA, MX, NS, SPF.
concurrency	integer	5	Domains in parallel (1-20). At most 2 requests per RDAP server at once.
timeoutSecs	integer	15	Timeout per request.
includeFailed	boolean	true	Keep rows for failed lookups (they are free).
bootstrapUrl	string	IANA	Advanced: alternative bootstrap file.

Sample inputs

Expiry monitoring (run daily, alert on daysUntilExpiry < 30):

{ "domains": ["mycompany.com", "mycompany.io", "brand.co.uk"], "includeDns": false }

Lead enrichment (registrar, age and mail setup for a list of prospect sites):

{ "domains": ["https://acme.com/about", "sales@globex.com", "initech.com.au"], "includeDns": true }

Availability check (registered: false means RDAP answered "not found"):

{ "domains": ["my-new-idea.com", "my-new-idea.net", "my-new-idea.dev"], "includeDns": false }

Pricing

Pay per event: $2.00 per 1,000 domains ($0.002 per domain). You are charged only for domains that get an RDAP answer, including "not found" (unregistered). Network errors, timeouts and rate-limit failures are free.

Domains	Approx. cost
100	$0.20
1,000	$2.00
10,000	$20.00

Platform usage is included in the event price.

Output example

{
  "domain": "example.com",
  "input": "https://www.example.com/",
  "tld": "com",
  "rdapServer": "https://rdap.verisign.com/com/v1/",
  "registered": true,
  "registrar": "RESERVED-Internet Assigned Numbers Authority",
  "registrarIanaId": "376",
  "registrarUrl": null,
  "abuseEmail": "abuse@iana.example",
  "creationDate": "1995-08-14T04:00:00Z",
  "expirationDate": "2026-08-13T04:00:00Z",
  "lastChangedDate": "2025-08-14T07:01:34Z",
  "daysUntilExpiry": 224,
  "domainAgeDays": 11097,
  "statuses": ["client delete prohibited", "client transfer prohibited"],
  "nameservers": ["a.iana-servers.net", "b.iana-servers.net"],
  "dnssec": true,
  "registrantOrg": null,
  "registrantCountry": null,
  "dns": { "a": ["93.184.216.34"], "aaaa": [], "mx": [], "ns": ["a.iana-servers.net"], "spf": "v=spf1 -all" },
  "error": null,
  "rdapUrl": "https://rdap.verisign.com/com/v1/domain/example.com"
}

FAQ

Why is the registrant empty? Since GDPR most registries and registrars redact personal data. registrantOrg and registrantCountry are filled only when the public RDAP record contains them. The actor does not try to obtain non-public data.

What about rate limits? The actor keeps at most 2 concurrent requests per RDAP server and retries HTTP 429/503 with backoff, honouring Retry-After. For very large lists, keep concurrency moderate.

Is registered: false a guarantee that a domain is available? No. It means the registry answered "not found" (HTTP 404), which is a strong hint. Reserved names, restricted TLD rules or a registry outage can differ. Confirm with a registrar before buying.

Which TLDs work? Any TLD with an RDAP service in the IANA bootstrap. A few ccTLDs still have no RDAP; those rows show an error and are not charged.

Multi-part suffixes? A bundled list covers common ones (co.uk, com.au, co.nz, com.br, ...). Uncommon suffixes may need the registrable domain given explicitly.

License: MIT.