Domains are digital identities; by default, everyone has the right to know who they belong to. The protocol that helps you find that information is called WHOIS. It is a public database with essential information about a registered domain, proving vital for domain management.
Whether you want to buy a domain that matches your business name or check if anyone is misusing your trademark, WHOIS is the first step to getting started:
https://freename.io/whois/