WHOIS Lookup Tool
Discover registration details for any domain name or IP address block
Note: This tool uses a public API with limited requests. If you encounter errors, please try again later.
For demonstration purposes, try domains like: google.com, microsoft.com, or vercel.com
This tool displays publicly available WHOIS information
Learn more about WHOISWhat is WHOIS?
WHOIS (pronounced as "who is") is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block, or an autonomous system.
Why WHOIS Information Matters
WHOIS data provides valuable information about domain ownership, creation and expiration dates, registrar details, and contact information. This information can be useful for:
- Verifying domain ownership
- Contacting domain owners for acquisition inquiries
- Investigating suspicious domains
- Checking domain age and expiration
- Identifying the registrar for domain transfers
Privacy Considerations
Many domain registrars now offer WHOIS privacy protection services that mask the real registrant information to protect domain owners from spam, identity theft, and other privacy concerns. This is why some WHOIS lookups may show privacy service details instead of the actual domain owner.