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

Results forwww.cloud.stack.com.ar

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-12-04T03:22:39.969	2020-12-04T00:00:00	2021-03-04T23:59:59	cloud.stack.com.ar	www.cloud.stack.com.ar	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-12-04T03:22:39.565	2020-12-04T00:00:00	2021-03-04T23:59:59	cloud.stack.com.ar	www.cloud.stack.com.ar	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-08-30T09:03:10.454	2020-08-30T00:00:00	2020-11-28T23:59:59	cloud.stack.com.ar	www.cloud.stack.com.ar	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-08-30T09:03:09.935	2020-08-30T00:00:00	2020-11-28T23:59:59	cloud.stack.com.ar	www.cloud.stack.com.ar	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-08-13T23:23:41.317	2020-08-13T00:00:00	2020-11-11T23:59:59	cloud.stack.com.ar	www.cloud.stack.com.ar	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-08-13T23:23:41.011	2020-08-13T00:00:00	2020-11-11T23:59:59	cloud.stack.com.ar	www.cloud.stack.com.ar	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-06-04T12:25:34.275	2020-06-04T11:25:33	2020-09-02T11:25:33	www.cloud.stack.com.ar	www.cloud.stack.com.ar	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-06-04T12:25:34.078	2020-06-04T11:25:33	2020-09-02T11:25:33	www.cloud.stack.com.ar	www.cloud.stack.com.ar	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3