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

Results forwww.server2.stack.com.ar

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-01-04T17:36:45.146	2021-01-04T00:00:00	2022-01-04T23:59:59	server2.stack.com.ar	www.server2.stack.com.ar	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2021-01-04T17:36:44.521	2021-01-04T00:00:00	2022-01-04T23:59:59	server2.stack.com.ar	www.server2.stack.com.ar	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-10-19T14:34:13.152	2020-10-19T00:00:00	2021-10-19T23:59:59	server2.stack.com.ar	www.server2.stack.com.ar	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-10-19T14:34:12.724	2020-10-19T00:00:00	2021-10-19T23:59:59	server2.stack.com.ar	www.server2.stack.com.ar	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"