Whois Lookup

A WHOIS lookup is a query that retrieves publicly available registration information about a domain name. When someone registers a domain, they are required to provide contact and administrative details to the domain registrar. These details are stored in WHOIS databases maintained by registries and can be queried by anyone using a WHOIS lookup tool.

The information returned by a WHOIS lookup typically includes the name of the registrar, the dates the domain was created and when it expires, the nameservers that handle DNS for the domain, and status codes indicating whether the domain is active, locked, or pending transfer. Some records also include the registrant's name, organization, and country, though this varies based on privacy settings and the applicable legal framework.

WHOIS data is used for many purposes. Security researchers use it to investigate phishing domains and track malicious activity. Businesses use it to verify domain ownership before acquisitions or partnerships. Network administrators use it to contact domain owners about abuse or technical issues. It is also helpful for checking domain expiry dates to prevent accidental lapses in registration.

This tool uses the RDAP (Registration Data Access Protocol), which is the modern successor to the legacy WHOIS text protocol. RDAP provides structured JSON responses, supports internationalized domain names, and includes standardized access controls. ICANN has mandated RDAP support across all generic top-level domains, making it the most reliable method for querying domain registration data today.

If you are concerned about your personal information appearing in WHOIS records, most registrars offer domain privacy protection services that replace your details with proxy information. Combined with a VPN to protect your IP address while browsing, you can maintain strong privacy both as a domain owner and as an everyday internet user.