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

Results forwebdisk.identityrequired.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2024-06-11T13:53:11.959	2024-06-11T12:53:11	2024-09-09T12:53:10	cpanel.identityrequired.com	webdisk.identityrequired.com	C=US, O=Let's Encrypt, CN=R11
2024-06-11T13:53:11.701	2024-06-11T12:53:11	2024-09-09T12:53:10	cpanel.identityrequired.com	webdisk.identityrequired.com	C=US, O=Let's Encrypt, CN=R11
2024-06-11T13:41:50.892	2024-06-11T12:41:50	2024-09-09T12:41:49	identityrequired.com	webdisk.identityrequired.com	C=US, O=Let's Encrypt, CN=R10
2024-06-11T13:41:50.493	2024-06-11T12:41:50	2024-09-09T12:41:49	identityrequired.com	webdisk.identityrequired.com	C=US, O=Let's Encrypt, CN=R10