Whois

Whois lookup.

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.

Command	Description
!whois [url]	Returns whois lookup for [url].
!whois [url] txt	Returns whois lookup for [url] and then send as text file.
!whois [url] pm	Returns whois lookup for [url] into requester private message.
!whois [url] pmtxt	Returns whois lookup file for [url] and then send into requester private message.

!whois [url] pm and !whois [url] pmtxt only works in group.

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Whois plugin uses whois package which is packaged on most GNU/Linux distros.
Here is how to install whois on Debian based distros: sudo apt install whois