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

Results forwww.sofic.io

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-08-08T06:05:04.944	2021-08-06T05:51:18	2021-11-04T06:51:18	ouders.speelpleinwerking.com	www.sofic.io	C=US, O=Google Trust Services LLC, CN=GTS CA 1D4
2021-08-06T06:53:40.273	2021-08-06T05:51:18	2021-11-04T06:51:18	ouders.speelpleinwerking.com	www.sofic.io	C=US, O=Google Trust Services LLC, CN=GTS CA 1D4
2021-06-11T17:45:26.448	2021-06-09T01:29:47	2021-09-07T02:29:47	www.boldx.com	www.sofic.io	C=US, O=Google Trust Services LLC, CN=GTS CA 1D4
2021-06-09T02:32:36.878	2021-06-09T01:29:47	2021-09-07T02:29:47	www.boldx.com	www.sofic.io	C=US, O=Google Trust Services LLC, CN=GTS CA 1D4
2021-06-09T01:08:26.092	2021-06-09T00:08:25	2021-09-07T00:08:25	www.sofic.io	www.sofic.io	C=US, O=Let's Encrypt, CN=R3
2021-06-09T01:08:25.938	2021-06-09T00:08:25	2021-09-07T00:08:25	www.sofic.io	www.sofic.io	C=US, O=Let's Encrypt, CN=R3