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

Results forhostmaster.smartel.fi

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2022-12-19T12:35:16.282	2022-12-19T11:35:15	2023-03-19T11:35:14	smartel.fi	*.smartel.fi	C=US, O=Let's Encrypt, CN=R3
2022-12-19T12:35:16.036	2022-12-19T11:35:15	2023-03-19T11:35:14	smartel.fi	*.smartel.fi	C=US, O=Let's Encrypt, CN=R3
2022-12-18T12:06:26.211	2022-12-18T11:06:25	2023-03-18T11:06:24	smartel.fi	*.smartel.fi	C=US, O=Let's Encrypt, CN=R3
2022-12-18T12:06:25.894	2022-12-18T11:06:25	2023-03-18T11:06:24	smartel.fi	*.smartel.fi	C=US, O=Let's Encrypt, CN=R3
2022-10-10T19:59:40.828	2022-10-10T18:59:40	2023-01-08T18:59:39	smartel.fi	*.smartel.fi	C=US, O=Let's Encrypt, CN=R3
2022-10-10T19:59:40.547	2022-10-10T18:59:40	2023-01-08T18:59:39	smartel.fi	*.smartel.fi	C=US, O=Let's Encrypt, CN=R3