WHOIS Domain & IP Lookup

WHOIS is a query and response protocol used to look up information about registered domain names. It provides details such as the domain registrar, registration and expiration dates, nameservers, and contact information for the domain owner (when not protected by privacy services).

Yes, our WHOIS lookup tool is completely free to use. There are no registration requirements, no query limits, and no hidden fees. You can look up as many domains as you need.

Many domain registrars offer WHOIS privacy protection services that replace personal contact information with generic registrar details. This helps protect domain owners from spam, unwanted contact, and potential security risks associated with publicly available personal information.

RDAP (Registration Data Access Protocol) is the modern successor to WHOIS. While WHOIS returns data in plain text format, RDAP provides structured JSON responses with better standardization, security features, and internationalization support. Our tool automatically uses RDAP when available and falls back to traditional WHOIS for older systems.

WHOIS data is retrieved directly from authoritative domain registries and registrars. The accuracy depends on the information provided by domain registrants. Our system caches data for 7 days to balance freshness with server load, ensuring you always get reliable information.

We support most popular domain extensions (TLDs) through both RDAP and traditional WHOIS protocols. This includes common TLDs like .com, .net, .org, as well as country-code TLDs and newer generic TLDs. Some restricted or newer extensions may have limited WHOIS availability.