Domain Age & WHOIS Checker

Look up domain registration data via RDAP — the IETF-standardized successor to WHOIS. Structured JSON, no scraping, no API key. Get registrar, creation date, expiration date, computed domain age, nameservers, and status codes for any domain, in bulk.

Pricing: $0.0001 one-time actor-start + $0.003 per domain successfully resolved. Domains that don't resolve (never registered, or the TLD's registry doesn't support RDAP) are never charged.

Why RDAP instead of scraping WHOIS pages

Legacy WHOIS is unstructured plain text with a different format per registry, and many registries now redact WHOIS output. RDAP replaced it as the IETF standard (RFC 7480+): every registry publishes RDAP as clean, structured JSON, no rate-limit-prone scraping needed. This actor queries rdap.org, a public RDAP bootstrap service that resolves the correct authoritative registry server per TLD.

Input

Field	Type	Required	Description
domains	array<string>	one of domains/domain	Domains to check. Bare domains or full URLs both work.
domain	string	one of domains/domain	Single-domain convenience alternative.

Output (per domain)

{
  "domain": "google.com",
  "found": true,
  "registrar": "MarkMonitor Inc.",
  "createdDate": "1997-09-15T04:00:00Z",
  "expiresDate": "2028-09-14T04:00:00Z",
  "ageDays": 10559,
  "ageYears": 28.9,
  "nameservers": ["NS1.GOOGLE.COM", "NS2.GOOGLE.COM"],
  "status": ["client delete prohibited", "client transfer prohibited"],
  "reason": null,
  "checkedAt": "2026-08-13T17:24:00Z"
}

Domains that don't resolve return found: false with a reason (not_found_or_unregistered, unsupported_tld, network_error, etc.) — never a fabricated result.

What this doesn't do

No legacy-WHOIS plain-text parsing (RDAP coverage is now near-universal across gTLDs and most ccTLDs, but a handful of smaller ccTLD registries haven't adopted RDAP yet — those return unsupported_tld, not a guess).