Free Online Whois Lookup Tool

What is Whois Lookup?

Whois (pronounced "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 number. A Whois lookup provides information including the domain's registrar, registrant contact information (often redacted for privacy), registration and expiration dates, and name servers. This domain Whois lookup service helps you access this public data.

Why Use Our Free Whois Search Tool?

• Domain Ownership Information: Find out who owns a domain name (though privacy services often obscure direct personal details).
• Check Domain Availability (Indirectly): While not a domain availability checker, if a Whois lookup returns no record or an error, the domain might be available (but always verify with a registrar).
• Registrar and Expiration Details: Discover the registrar of a domain and when it's set to expire.
• Name Server Information: See which name servers a domain is using, which can be helpful for technical troubleshooting.
• Investigate Suspicious Domains: Gather information about potentially malicious or infringing domains.
• Simple Interface: Easily check domain ownership online by entering a domain name.

How to Use the Whois Lookup Tool

• Enter Domain or IP: Type the domain name (e.g., `example.com`) or an IP address you want to investigate into the input field.
• Choose a Lookup Service:
  • Click **"Check with ICANN Lookup"** to perform the search using ICANN's official lookup tool. ICANN (Internet Corporation for Assigned Names and Numbers) oversees domain name system management.
  • Click **"Check with DomainTools"** to use DomainTools' Whois lookup, another reputable service.
• View Results on External Site: A new browser tab will open, taking you to the selected Whois service. The Whois information for the domain will be displayed there.
• Download Summary (Manual): After performing a lookup, you can click the "Download Lookup Info" button on our page. This will download a text file noting the domain you looked up and the date. *It does not download the actual Whois data from the external site.*

Privacy Note: Due to GDPR and other privacy regulations, much of the personal contact information in Whois records is now redacted or hidden behind privacy proxy services offered by registrars.