WHOIS Lookup
Free online WHOIS lookup tool. Check domain registration details — registrar, creation date, expiration date, and name servers. Essential for domain research and brand protection.
Enter a domain name and click "Lookup" to see WHOIS data.
How to Use WHOIS Lookup
Enter a Domain Name
Type a domain name (like example.com) without the protocol or path. The tool accepts both registered domains and subdomains — it will extract the registered domain automatically.
View WHOIS Results
The tool queries public WHOIS servers to retrieve domain registration data — registrar name, creation date, expiration date, name servers, and registrant information (if not privacy-protected).
Check Key Details
Pay attention to the expiration date — expired domains can be registered by anyone. Check the name servers to understand hosting setup. Note that many domains now use WHOIS privacy protection, hiding registrant contact details.
What WHOIS Tells You
| Field | What It Means |
|---|---|
| Domain Name | The registered domain |
| Registrar | The company where the domain was registered (e.g., GoDaddy, Namecheap) |
| Creation Date | When the domain was first registered |
| Expiration Date | When the domain registration expires if not renewed |
| Name Servers | DNS servers authoritative for this domain |
| Registrant | The organization or person who registered the domain (often privacy-protected) |
Frequently Asked Questions
What is WHOIS?
WHOIS is a public query protocol and database that stores information about who owns a domain name, when it was registered, when it expires, and which name servers it uses. ICANN requires accredited registrars to maintain WHOIS data for every registered domain. Think of it as the phone book for the domain name system.
Why do some domains hide WHOIS information?
Many registrars offer WHOIS privacy protection (also called Private Registration). This replaces the registrant's personal contact information with the registrar's proxy information. It's a privacy feature, not a sign of anything suspicious. GDPR regulations in Europe have also led many registrars to redact personal data from public WHOIS by default.
What can I learn from a WHOIS lookup?
WHOIS reveals: when a domain was first registered (creation date), when it expires (critical for domain investors and brand protection), which registrar manages it, which name servers it uses (useful for understanding hosting and DNS setup), and sometimes the registrant's organization name and country. The information available varies by TLD and privacy settings.
Is WHOIS lookup legal?
Yes, WHOIS is a public protocol. Querying WHOIS is legal and expected — it's the standard way to check domain availability, investigate potential trademark infringement, or verify domain ownership during acquisitions. Rate limits apply: excessive automated WHOIS queries from the same IP may be blocked by WHOIS servers.
When to Use WHOIS Lookup
WHOIS is one of the oldest internet protocols still in active use. Despite privacy changes, it remains an essential tool for domain research, security investigations, and business decisions.
Common Scenarios
- Domain investing: Check expiration dates to identify soon-to-expire domains that might become available
- Brand protection: Monitor for domains registered with your trademark by unknown parties
- Security research: Investigate suspicious domains — recent creation dates are a red flag for phishing sites
- Competitive research: Discover which registrar and hosting provider a competitor uses
- M&A due diligence: Verify domain ownership and expiration before acquiring a company