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

Results forwebdisk.datahansen.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2018-03-22T19:56:22.397	2018-03-15T00:00:00	2018-06-13T23:59:59	datahansen.com	webdisk.datahansen.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2018-01-03T18:50:32.379	2017-12-29T00:00:00	2018-03-29T23:59:59	datahansen.com	webdisk.datahansen.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2017-10-18T18:45:25.446	2017-10-14T00:00:00	2018-01-12T23:59:59	datahansen.kaso.dk	webdisk.datahansen.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2017-08-20T18:34:09.716	2017-08-14T00:00:00	2017-11-12T23:59:59	datahansen.com	webdisk.datahansen.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"