WHOIS Lookup
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What is WHOIS Lookup?
WHOIS is a query-and-response protocol used to look up information stored in databases of registered internet resources. Originally developed in the 1980s, it remains one of the most widely used tools for investigating domain names and IP addresses.
When you perform a WHOIS lookup, you can discover who owns a particular domain name, when it was registered and when it expires, which name servers it uses, and the contact details associated with the registration. For IP addresses, WHOIS reveals the organization that has been allocated the address block, the regional internet registry responsible for the allocation, and the network range the IP belongs to.
Our free WHOIS lookup tool queries the appropriate WHOIS servers in real time, giving you accurate and up-to-date registration information for any domain or IP address.
What Information Can You Find?
Domain Registration Details
Find out which registrar manages the domain, when it was first registered, when it expires, and its current status codes such as clientTransferProhibited or serverDeleteProhibited.
Name Server Information
Discover the DNS servers configured for a domain, which can help you identify the hosting provider and troubleshoot DNS resolution issues.
Registrant Information
When available, view the organization or individual behind a domain registration, including their location and contact details. Note that many domains use privacy protection to mask this data.
IP Address Details
Look up the network range an IP address belongs to, the ISP or organization it is allocated to, and the regional internet registry (such as ARIN, RIPE, or APNIC) that manages the allocation.
Frequently Asked Questions
What is WHOIS?
WHOIS is a public protocol and database system used to look up information about domain name registrations and IP address allocations. It provides details such as the registrant's organization, registration and expiration dates, name servers, and registrar information.
Is WHOIS lookup legal?
Yes, performing WHOIS lookups is completely legal. WHOIS data is publicly available by design as part of the domain registration system. However, many registrars now offer WHOIS privacy protection to redact personal information from public records.
Why is WHOIS information sometimes hidden?
Domain registrants can purchase WHOIS privacy protection (also called domain privacy) from their registrar. This replaces personal contact information with the registrar's proxy service details, protecting the owner's identity while still meeting ICANN requirements.
What information does a WHOIS lookup show?
A WHOIS lookup typically reveals the domain registrar, registration and expiration dates, name servers, registrant organization, and status codes. For IP addresses, it shows the regional internet registry allocation, network range, and the organization assigned the IP block.