What Is WHOIS? A Complete Guide to Domain Ownership Lookup
<h2>What Is WHOIS?</h2><p>WHOIS is a public directory that stores registration details for every domain name on the internet. When you register a domain, your contact information — name, email, phone, address — gets recorded in the WHOIS database. Anyone can query it to find out who owns a domain, when it was registered, and when it expires.</p><h2>How to Run a WHOIS Lookup</h2><p>You can check WHOIS data several ways: use a web tool like whois.domaintools.com or lookup.icann.org, run <code>whois example.com</code> from your terminal, or use registrar lookup pages (Namecheap, GoDaddy, etc.).</p><h2>What WHOIS Data Includes</h2><p><strong>Registrant:</strong> The domain owner name and contact info. <strong>Registrar:</strong> The company where the domain was purchased. <strong>Registration Date:</strong> When the domain was first registered. <strong>Expiration Date:</strong> When the domain will expire if not renewed. <strong>Name Servers:</strong> The DNS servers the domain points to. <strong>Status Codes:</strong> Flags like clientTransferProhibited that indicate the domain state.</p><h2>WHOIS Privacy Protection</h2><p>Most registrars now offer free WHOIS privacy (also called domain privacy or proxy registration). This replaces your personal information with the registrar proxy details, keeping your name, email, and address hidden from public queries. Cloudflare, Namecheap, and Porkbun include it free.</p><h2>Why WHOIS Matters</h2><p>WHOIS is useful for checking domain expiration dates before buying expired domains, verifying domain ownership for business deals, investigating suspicious websites, finding contact information for domain purchase negotiations, and checking if a domain is about to expire and become available.</p><h2>RDAP: The Modern Replacement</h2><p>ICANN is transitioning from WHOIS to RDAP (Registration Data Access Protocol), which provides structured JSON responses instead of plain text, better privacy controls, and standardized output across registrars. Most registrars now support both protocols.</p><h2>Start Your Domain Search</h2><p>Check domain availability across 400+ extensions instantly. <a href="https://domydomains.com">Search on DomyDomains</a> — no account needed.</p>