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

Results forwebdisk.ridity.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2024-05-07T13:31:10.685	2024-05-07T12:31:10	2024-08-05T12:31:09	www.webdisk.ridity.com	www.webdisk.ridity.com	C=US, O=Let's Encrypt, CN=R3
2024-05-07T13:31:10.444	2024-05-07T12:31:10	2024-08-05T12:31:09	www.webdisk.ridity.com	www.webdisk.ridity.com	C=US, O=Let's Encrypt, CN=R3
2024-04-10T22:32:41.321	2024-04-10T21:32:40	2024-07-09T21:32:39	webdisk.ridity.com	webdisk.ridity.com	C=US, O=Let's Encrypt, CN=R3
2024-04-10T22:32:41.001	2024-04-10T21:32:40	2024-07-09T21:32:39	webdisk.ridity.com	webdisk.ridity.com	C=US, O=Let's Encrypt, CN=R3
2019-10-21T14:11:16.691	2019-10-21T00:00:00	2020-01-19T23:59:59	ridity.com	webdisk.ridity.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2019-10-21T14:10:56.532	2019-10-21T00:00:00	2020-01-19T23:59:59	ridity.com	webdisk.ridity.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"