Recently Analyzed Domain Names
Explore the latest WHOIS lookups processed by our API. Every record is fetched in real time from authoritative WHOIS and RDAP servers — no stale data, no guesswork.
Showing 50 most recent lookups
Who Uses Domain Registration Data?
Cybersecurity Teams
Investigate phishing domains, verify domain ownership, and trace malicious infrastructure. Combine with DNS lookups and SSL checks for full threat analysis.
Domain Investors
Track expiring domains, evaluate registration history, and spot acquisition opportunities. Use our Availability API to check domain status in real time.
Brand Protection
Monitor domains similar to your brand and detect trademark infringement early. Set up automated alerts for ownership or DNS changes.
What Is a WHOIS Lookup?
A WHOIS lookup reveals the registration details behind a domain name — who registered it, when it was created, when it expires, and which registrar manages it. This information is essential for cybersecurity investigations, legal proceedings, domain acquisitions, and brand protection. WhoisJSON provides this data in structured JSON or XML format via a simple REST API, making it easy to integrate into any application or workflow.
More Than Just WHOIS
Every domain listed here can also be analyzed for DNS records (A, MX, TXT, CNAME, NS), SSL certificate details (issuer, validity, chain), and registration status. All seven services — WHOIS, DNS, SSL, availability, subdomains, email domain intelligence, and monitoring — are accessible with a single API key. Explore the full documentation to get started.
Get WHOIS Data for Any Domain
Structured JSON responses, sub-200ms latency, 1,500+ TLDs supported.