What is Whois?
Accoriding to Wikipedia, "WHOIS (pronounced as the phrase "who is") is a
query and response protocol that is widely used for querying databases
that store the registered users or assignees of an Internet resource,
such as a
domain name, an IP address block or an autonomous system, but is
also used for a wider range of other information. The protocol stores
and delivers database content in a human-readable format. The current
iteration of the WHOIS
protocol was drafted by the Internet Society, and is documented
in RFC 3912."