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

Results forwebmail.technicalroperescue.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-01-14T12:09:41.467	2019-01-14T00:00:00	2019-04-14T23:59:59	technicalroperescue.com	webmail.technicalroperescue.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2019-01-14T12:09:28.727	2019-01-14T00:00:00	2019-04-14T23:59:59	technicalroperescue.com	webmail.technicalroperescue.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2018-10-30T11:04:53.407	2018-10-30T00:00:00	2019-01-28T23:59:59	technicalroperescue.com	webmail.technicalroperescue.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2018-10-30T11:04:38.441	2018-10-30T00:00:00	2019-01-28T23:59:59	technicalroperescue.com	webmail.technicalroperescue.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2018-08-15T11:03:07.969	2018-08-15T00:00:00	2018-11-13T23:59:59	technicalroperescue.com	webmail.technicalroperescue.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2018-08-15T11:02:52.798	2018-08-15T00:00:00	2018-11-13T23:59:59	technicalroperescue.com	webmail.technicalroperescue.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"