What is Whois?
The Whois service on the Internet is a protocol that allows users to obtain information about the owners of domain names, IP addresses, and other Internet resources. The term "whois" refers to the question "who is it?" in English, and the Whois service provides information about the person or entity that owns a domain name or IP address.
The Whois service is maintained by the Internet Corporation for Assigned Names and Numbers (ICANN), a non-profit organization that administers the Internet's domain name system. ICANN requires domain name registrars to maintain a public database of contact information for domain name owners.