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

Results forwww.mastercomp.io

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2023-12-24T10:38:00.703	2023-12-24T00:00:00	2024-03-23T23:59:59	mastercomp.io	www.mastercomp.io	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2023-12-24T10:29:38.23	2023-12-24T00:00:00	2024-03-23T23:59:59	mastercomp.io	www.mastercomp.io	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2023-10-09T00:41:11.188	2023-10-08T23:41:10	2024-01-06T23:41:09	www.mastercomp.deoliveira.ca	*.mastercomp.io	C=US, O=Let's Encrypt, CN=R3
2023-10-09T00:41:10.868	2023-10-08T23:41:10	2024-01-06T23:41:09	www.mastercomp.deoliveira.ca	*.mastercomp.io	C=US, O=Let's Encrypt, CN=R3
2023-08-08T09:01:36.586	2023-08-08T00:00:00	2023-11-06T23:59:59	mastercomp.io	www.mastercomp.io	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"
2023-08-08T09:01:35.65	2023-08-08T00:00:00	2023-11-06T23:59:59	mastercomp.io	www.mastercomp.io	C=US, ST=TX, L=Houston, O="cPanel, Inc.", CN="cPanel, Inc. Certification Authority"