The WHOIS Checker is a free online tool that looks up the publicly available registration information (WHOIS data) for any domain name. WHOIS records contain details about who registered a domain, when it was registered, when it expires, who the registrar is and what nameservers it uses.

WHOIS lookups are used by webmasters, SEOs, domain investors, security researchers and legal professionals to investigate domain ownership and history.

How to Run a WHOIS Lookup

• Enter the domain name you want to investigate (e.g. example.com)
• Click Check WHOIS
• View registrant details, registration dates, registrar information and nameservers

What WHOIS Data Reveals

• Registrant name and organization — who owns the domain (may be redacted under GDPR)
• Registration date — when the domain was first registered
• Expiry date — when the domain registration ends
• Registrar — where the domain is registered (GoDaddy, Namecheap, etc.)
• Nameservers — which DNS servers handle the domain

Privacy Note

Since GDPR (2018), many European domain owners have their contact details redacted in WHOIS records. For .com/.net domains, registrars offer WHOIS privacy protection. This tool queries publicly available WHOIS data only. Free, no login required.