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

Results forwebdisk.namebirth.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-04-06T10:16:59.906	2020-04-06T00:00:00	2020-07-05T23:59:59	namebirth.com	webdisk.namebirth.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-04-06T10:16:59.596	2020-04-06T00:00:00	2020-07-05T23:59:59	namebirth.com	webdisk.namebirth.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-04-06T09:29:02.672	2020-04-06T00:00:00	2020-07-05T23:59:59	namebirth.com	webdisk.namebirth.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-04-06T09:29:02.342	2020-04-06T00:00:00	2020-07-05T23:59:59	namebirth.com	webdisk.namebirth.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-04-02T20:52:49.772	2020-04-02T00:00:00	2020-07-01T23:59:59	namebirth.com	webdisk.namebirth.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-04-02T20:52:49.217	2020-04-02T00:00:00	2020-07-01T23:59:59	namebirth.com	webdisk.namebirth.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-01-29T08:14:48.739	2020-01-29T00:00:00	2020-04-28T23:59:59	namebirth.com	webdisk.namebirth.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2020-01-29T08:14:34.797	2020-01-29T00:00:00	2020-04-28T23:59:59	namebirth.com	webdisk.namebirth.com	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"