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

Results forwebdisk.trafficweb.org

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2022-01-17T19:58:01.838	2022-01-17T18:58:01	2022-04-17T18:58:00	trafficweb.org	*.trafficweb.org	C=US, O=Let's Encrypt, CN=E1
2022-01-17T19:58:01.345	2022-01-17T18:58:01	2022-04-17T18:58:00	trafficweb.org	*.trafficweb.org	C=US, O=Let's Encrypt, CN=E1
2020-11-12T19:14:11.185	2020-11-12T18:14:10	2021-02-10T18:14:10	trafficweb.org	*.trafficweb.org	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-11-12T19:14:10.992	2020-11-12T18:14:10	2021-02-10T18:14:10	trafficweb.org	*.trafficweb.org	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-12-13T08:35:09.525	2018-12-13T00:00:00	2019-03-13T23:59:59	trafficweb.org	webdisk.trafficweb.org	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2018-12-13T08:34:52.93	2018-12-13T00:00:00	2019-03-13T23:59:59	trafficweb.org	webdisk.trafficweb.org	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2018-05-23T05:28:58.731	2018-05-23T00:00:00	2018-08-21T23:59:59	trafficweb.org	webdisk.trafficweb.org	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2018-05-23T05:28:34.718	2018-05-23T00:00:00	2018-08-21T23:59:59	trafficweb.org	webdisk.trafficweb.org	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2018-03-15T01:51:54.003	2018-03-08T00:00:00	2018-06-06T23:59:59	trafficweb.org	webdisk.trafficweb.org	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"