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

Results forcpanel.computerfast.net

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-09-30T15:14:23.232	2021-09-30T14:14:22	2021-12-29T14:14:21	91girl.tv	*.computerfast.net	C=US, O=Let's Encrypt, CN=R3
2021-09-30T15:14:22.864	2021-09-30T14:14:22	2021-12-29T14:14:21	91girl.tv	*.computerfast.net	C=US, O=Let's Encrypt, CN=R3
2021-01-28T06:23:58.966	2021-01-28T05:23:58	2021-04-28T05:23:58	3dxxxcartoons.com	*.computerfast.net	C=US, O=Let's Encrypt, CN=R3
2021-01-28T06:23:58.762	2021-01-28T05:23:58	2021-04-28T05:23:58	3dxxxcartoons.com	*.computerfast.net	C=US, O=Let's Encrypt, CN=R3
2020-11-28T22:25:26.328	2020-11-28T21:25:26	2021-02-26T21:25:26	computerfast.net	*.computerfast.net	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-11-28T22:25:26.09	2020-11-28T21:25:26	2021-02-26T21:25:26	computerfast.net	*.computerfast.net	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2017-12-09T03:37:07.462	2017-12-04T00:00:00	2018-03-04T23:59:59	computerfast.net	cpanel.computerfast.net	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2017-10-16T22:28:17.228	2017-09-19T00:00:00	2017-12-18T23:59:59	computerfast.net	cpanel.computerfast.net	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2017-04-21T23:16:45.099	2017-04-18T00:00:00	2017-07-17T23:59:59	computerfast.net	cpanel.computerfast.net	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"