WHOIS Lookup
Look up domain registration information including owner details, registrar, creation and expiration dates, and nameservers.
What is WHOIS?
WHOIS is a query and response protocol widely used for querying databases that store registered users or assignees of an Internet resource, such as a domain name or an IP address block.
What Information Does WHOIS Provide?
- Domain Name: The registered domain and its status.
- Registrar: The company where the domain was registered.
- Registration Date: When the domain was first registered.
- Expiration Date: When the domain registration expires.
- Name Servers: DNS servers authoritative for the domain.
- Registrant Info: Contact details of the domain owner (often redacted due to privacy laws).
- Domain Status: Codes indicating the domain's current state (e.g., active, locked, pending delete).
Understanding Domain Status Codes
- clientDeleteProhibited: The registrar has locked the domain to prevent deletion.
- clientTransferProhibited: The domain cannot be transferred to another registrar.
- clientUpdateProhibited: The domain cannot be modified.
- serverTransferProhibited: The registry has locked the domain against transfers.
- pendingDelete: The domain is pending deletion.
- redemptionPeriod: The domain is in the redemption grace period after expiration.
How does this tool work?
This tool queries public WHOIS servers to retrieve registration information for domain names and IP addresses. When you enter a domain, it connects to the appropriate registrar's WHOIS server and displays the registration details in a structured format.
For domain lookups, the tool follows the WHOIS referral chain — first checking the registry (e.g., .com registry), then following referrals to the registrar's WHOIS server for complete data.
Why should you use WHOIS lookup?
- Domain research: Check if a domain name is available or already registered.
- Security investigation: Identify who owns a suspicious domain or when it was created.
- Brand protection: Monitor domains similar to your brand that could be used for phishing.
- Technical troubleshooting: Verify DNS delegation and name server configuration.
- Due diligence: Research domain ownership before business transactions.
WHOIS Privacy
Due to privacy regulations like GDPR, many domain registrars now redact personal information from WHOIS records. This means you may see "REDACTED FOR PRIVACY" instead of actual contact details. Some registrars offer WHOIS privacy services as an add-on feature.
Frequently Asked Questions
What is a WHOIS lookup?
A WHOIS lookup queries a domain registration database to find information about who registered a domain, including the owner, registrar, creation date, expiration date, and nameservers.
Is WHOIS information public?
Yes, WHOIS data is generally public. However, many domain owners use privacy protection services that replace personal information with the privacy service's contact details.
Can I look up any domain with this tool?
Yes, you can look up any registered domain name. Simply enter the domain and click Look Up. The tool is free and requires no signup.
How accurate is WHOIS data?
WHOIS data comes directly from domain registrars and is generally accurate. However, some domains use privacy protection, and data may not be updated immediately after changes.
Is this WHOIS lookup tool free?
Yes, this WHOIS lookup tool is completely free. No account, no signup, and no payment required. All lookups run locally in your browser.