It can be anything! An apex, subdomain, or even a URL.

Results forwww.server5.stack.com.ar

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-02-15T09:00:41.618	2021-02-15T00:00:00	2022-02-15T23:59:59	server5.stack.com.ar	www.server5.stack.com.ar	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2021-02-15T09:00:40.957	2021-02-15T00:00:00	2022-02-15T23:59:59	server5.stack.com.ar	www.server5.stack.com.ar	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-12-03T05:51:23.579	2020-12-03T00:00:00	2021-12-03T23:59:59	server5.stack.com.ar	www.server5.stack.com.ar	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-12-03T05:51:22.907	2020-12-03T00:00:00	2021-12-03T23:59:59	server5.stack.com.ar	www.server5.stack.com.ar	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"