WHOIS Domain Lookup & Availability Checker (RDAP)

Check hundreds of domains at once: is it available or registered, who is the registrar, when was it created, when does it expire, and which nameservers and status codes does it have. The data comes straight from the official registries through RDAP, the modern, structured successor of WHOIS.

• ✅ 1,200+ TLDs: .com, .net, .org, .de, .uk, .fr, .nl, .ai, .app, .dev, .shop, .xyz and every other TLD with a public RDAP service
• ✅ Availability check: available when the registry has no such domain
• ✅ Expiry monitoring: expiresAt and daysUntilExpiry for renewals, drop-catching and portfolio checks
• ✅ Paste anything: domains, website URLs, email addresses or internationalized names (münchen.de); subdomains are reduced to the registrable domain
• ✅ Fast: 34 domains in 2 seconds in our tests, with polite per-registry rate limits
• ✅ No personal data: only registry and registrar facts; registrant contacts are never collected

What can you use it for?

• Domain investors and brand protection: watch expiry dates and status of your portfolio or competitors' domains
• Name brainstorming: check a long list of ideas for free .com, .de or .ai names
• IT and security: audit nameservers, DNSSEC and transfer locks of all company domains
• Lead and market research: enrich website lists with domain age and registrar

Input example

{ "domains": ["apify.com", "https://www.wikipedia.org/wiki/X", "bbc.co.uk", "my-new-startup-idea-2031.com", "münchen.de"] }

Output example

Real output from a test run:

{
    "domain": "bbc.co.uk",
    "tld": "uk",
    "availability": "registered",
    "registered": true,
    "status": ["server delete prohibited", "server transfer prohibited", "server update prohibited"],
    "registrar": "British Broadcasting Corporation",
    "registrarIanaId": null,
    "registrarUrl": null,
    "registrarAbuseEmail": "nominet.admins@bbc.co.uk",
    "createdAt": "1994-12-13T03:49:48.000Z",
    "updatedAt": "2025-10-29T03:51:11.009Z",
    "expiresAt": "2034-12-13T03:49:48.000Z",
    "daysUntilExpiry": 2975,
    "nameservers": ["ddns0.bbc.co.uk", "ddns0.bbc.com", "ddns1.bbc.co.uk", "ddns1.bbc.com", "dns0.bbc.co.uk", "dns0.bbc.com", "dns1.bbc.co.uk", "dns1.bbc.com"],
    "dnssec": false,
    "rdapServer": "https://rdap.nominet.uk/uk/",
    "error": null,
    "checkedAt": "2026-10-20T21:04:58.525Z"
}

availability is one of:

• registered: the domain exists at the registry
• available: the registry has no such domain, so it can usually be registered (reserved or premium names can still be blocked; your registrar has the final word)
• unsupported: the TLD has no public RDAP service (for example .io, .ch, .jp), not charged
• unknown: the registry did not answer, not charged

Some registries publish less: .de, for example, shows status, nameservers and last change but no registrar or dates. A summary with all counts and invalid inputs is saved as OUTPUT in the key-value store.

Pricing

You pay per domain with a result (registered or available). Invalid inputs, unsupported TLDs and registry errors are free.

Paid Apify plans pay less: 10% off on Starter, 20% on Scale and 30% on Business and higher plans.

FAQ

Is this WHOIS? RDAP is the official replacement for WHOIS, run by the same registries, with clean JSON instead of free text. ICANN requires it for all generic TLDs.

Is it allowed? RDAP is a public service meant for this kind of lookup. Each registry has terms of use (DENIC for .de, for example, allows use for technical and administrative purposes and forbids advertising use). Use the results accordingly. You are responsible for your use of the data.

More tools from Tidelane Data

• Tech Stack Detector: CMS, frameworks and technologies of any website
• Wayback Machine Scraper: snapshots, archived URLs and site history
• UK Companies House Search: companies by SIC code, postcode or town
• Website Screenshot API: full-page and mobile screenshots without cookie banners

All our tools: apify.com/tidelane

---

Impressum

Levi Griesinger, Tidelane Data
Besigheimer Straße 18
74369, Löchgau, Deutschland
E-Mail: LeviGriesinger@gmail.com