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Validation

WHOIS.
One API Key.

Domain WHOIS lookup with parsed and raw data

Get Started FreeAlso available on RapidAPI →
Stateless API Processing — No request data stored

Features

Domain registration and expiration dates

Registrar and registrant information

Name server and DNS details

Bulk lookup up to 20 domains per request (PRO+)

Raw and parsed WHOIS data output

Domain availability checking

Use Cases

Domain Research

Research domain ownership, registration history, and expiration dates for acquisition targets or competitive intelligence.

Brand Protection

Monitor domain registrations for trademark infringement or brand impersonation attempts.

Fraud Detection

Verify domain age and ownership patterns to identify potentially fraudulent or newly-created suspicious domains.

Lead Enrichment

Add domain registration data to your leads for better qualification and outreach timing.

Pricing

Start free with 200/month. Scale up as you grow.

Free

200/month

Free
  • 200/month
  • 5/min
  • Hard limit
Get Started

Pro

10k/month

$9.99/mo
  • 10k/month
  • 30/min
  • $0.001/req
Get Started
Best Value

Ultra

100k/month

$49.99/mo
  • 100k/month
  • 150/min
  • $0.0005/req
Get Started

Mega

1M/month

$199/mo
  • 1M/month
  • 500/min
  • $0.00025/req
Get Started

Frequently Asked Questions

We support 1,500+ TLDs including all major gTLDs (.com, .net, .org) and ccTLDs (.uk, .de, .nl, etc.) with region-specific WHOIS servers.
Due to GDPR and privacy regulations, many registrars now redact personal information. We return whatever data is publicly available from the authoritative WHOIS server.
Yes, WHOIS lookups indicate whether a domain is registered. For dedicated availability checking with TLD suggestions, see our CheckCheck API.
WHOIS data is fetched in real-time from authoritative servers on each request, ensuring you always get the latest registration information.

Start using WHOIS API today

Free tier available. No credit card required.