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

Results forwebdisk.backup.studiosoft.co

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-09-13T04:47:05.261	2020-09-13T00:00:00	2020-12-12T23:59:59	backup.studiosoft.co	webdisk.backup.studiosoft.co	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-09-13T04:47:04.955	2020-09-13T00:00:00	2020-12-12T23:59:59	backup.studiosoft.co	webdisk.backup.studiosoft.co	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-06-29T23:49:16.15	2020-06-29T00:00:00	2020-09-27T23:59:59	backup.studiosoft.co	webdisk.backup.studiosoft.co	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-06-29T23:49:15.443	2020-06-29T00:00:00	2020-09-27T23:59:59	backup.studiosoft.co	webdisk.backup.studiosoft.co	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"