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

Results forwebdisk.cryptocoinconverter.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2022-10-27T23:02:34.799	2022-10-27T00:00:00	2023-01-25T23:59:59	cryptocoinconverter.com	webdisk.cryptocoinconverter.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2022-10-27T23:02:33.818	2022-10-27T00:00:00	2023-01-25T23:59:59	cryptocoinconverter.com	webdisk.cryptocoinconverter.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2022-09-20T00:27:07.824	2022-09-20T00:00:00	2022-12-19T23:59:59	cryptocoinconverter.com	webdisk.cryptocoinconverter.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2022-09-20T00:27:06.247	2022-09-20T00:00:00	2022-12-19T23:59:59	cryptocoinconverter.com	webdisk.cryptocoinconverter.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"