Domain Availability Checker & WHOIS (RDAP)
Pricing
from $2.00 / 1,000 domain checkeds
Domain Availability Checker & WHOIS (RDAP)
Check if domain names are available and get WHOIS data in bulk. Give it domains or brand names plus extensions (.com .io .ai .app): returns available or registered, registrar, creation and expiry dates, nameservers, DNSSEC and DNS, from official RDAP and WHOIS registries.
Pricing
from $2.00 / 1,000 domain checkeds
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Developer
Matheus Coelho
Maintained by CommunityActor stats
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Bookmarked
2
Total users
1
Monthly active users
3 days ago
Last modified
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Check hundreds of domain names in one run and get the registration details of the taken ones.
- Bulk availability: pass full domains, or pass brand names and a list of extensions (
mybrandx.com .io .ai .app .co) and every combination is checked. - WHOIS data for registered domains: registrar, creation date, expiration date, days until expiry, nameservers, DNSSEC and registry status codes.
- DNS check: whether the domain resolves and its IP addresses.
Data comes from the official registries: RDAP (the modern replacement for WHOIS) for 1,200+ extensions, falling back to classic WHOIS (port 43) for extensions without RDAP, such as .co and .de. No API key, no third-party reseller.
Use cases
- Naming a product or company: check a shortlist of names across all the extensions you care about.
- Domain investing: find soon-to-expire domains with
daysUntilExpiration. - Security and brand protection: audit lookalike domains, their registrars and nameservers.
- Lead enrichment: registrar, age and DNS of a company's domain.
- AI agents:
availableis a plaintrue/false, and every row has arecordType.
Input
| Field | What it does |
|---|---|
domains | Full domains, e.g. example.com. URLs are accepted. |
names | Names without extension, e.g. mybrand. Each is combined with every entry in tlds. |
tlds | Extensions for names (default: com, io, ai, app, co, net, org, dev). |
checkDns | Add DNS records and IPs (default on). |
maxDomains | Safety limit per run (default 500). |
maxConcurrency | Parallel lookups (default 5). |
Output
{"recordType": "domain","domain": "stripe.io","available": false,"status": "registered","method": "rdap","registrar": "SafeNames Ltd.","createdDate": "2013-06-04T21:19:25Z","expirationDate": "2027-06-06T21:19:25Z","daysUntilExpiration": 236,"nameservers": ["ns-1087.awsdns-07.org", "ns-1882.awsdns-43.co.uk"],"dnssec": false,"registryStatus": ["client transfer prohibited"],"hasDnsRecords": true}
An available domain looks like { "domain": "mybrand.ai", "available": true, "status": "available", "method": "rdap" }.
status can be available, registered or likely-available. The last one only appears when a registry offers neither RDAP nor reachable WHOIS and the answer comes from DNS alone, so double-check it with a registrar before buying.
Good to know
- Availability means "not registered at the registry". Premium or reserved names may still be unavailable or priced higher at registrars.
- Some registries (e.g.
.de) publish no registrar or dates over WHOIS; those fields arenull. - WHOIS servers throttle bursts. The Actor queues requests per registry, so big lists take a little longer but stay accurate.
Related Actors
- Google Ads Transparency Scraper: what ads a company runs on Google.
- App Store & Google Play Scraper: apps and reviews from both stores.
- US Government Contracts & Grants: federal contract winners and open grants.