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

Results forwww.test.intersofex.ro

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2017-11-19T03:55:39.594	2017-11-19T02:55:39	2018-02-17T02:55:39	celiberindustries.eu	www.test.intersofex.ro	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2017-09-19T02:03:03.941	2017-09-19T01:03:00	2017-12-18T01:03:00	test.intersofex.ro	www.test.intersofex.ro	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2017-05-04T22:59:00.969	2017-04-18T00:00:00	2017-07-17T23:59:59	test.intersofex.ro	www.test.intersofex.ro	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2017-03-31T23:59:28.588	2017-02-01T00:00:00	2017-05-02T23:59:59	test.intersofex.ro	www.test.intersofex.ro	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"