The query "who is" is very general and incomplete, but it most commonly refers to the question "Who is [someone or something]?," asking for identification or description of a person or entity. One closely related, specialized meaning of "WHOIS" is in the context of the Internet and domain names, where WHOIS is a protocol and database that allows people to look up information about who owns or manages a domain name or an IP address. The WHOIS database contains ownership details, contact information, registration dates, and technical details related to domain names and IP addresses. It is maintained by organizations coordinated by ICANN (Internet Corporation for Assigned Names and Numbers) and is widely used for administrative, legal, and technical purposes to identify domain owners and contacts.
If you mean something specific by "who is," such as a particular person or entity you want information about, please provide more details so I can give a precise answer.