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

Results forcom.principles.vc

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2022-12-02T20:40:36.879	2022-12-02T19:40:36	2023-03-02T19:40:35	xephcoin.com.principles.vc	xephcoin.com.principles.vc	C=US, O=Let's Encrypt, CN=R3
2022-12-02T20:40:36.198	2022-12-02T19:40:36	2023-03-02T19:40:35	xephcoin.com.principles.vc	xephcoin.com.principles.vc	C=US, O=Let's Encrypt, CN=R3
2022-11-30T18:59:42.07	2022-11-30T17:59:41	2023-02-28T17:59:40	theacademyofhair.com.principles.vc	theacademyofhair.com.principles.vc	C=US, O=Let's Encrypt, CN=R3
2022-11-30T18:59:41.466	2022-11-30T17:59:41	2023-02-28T17:59:40	theacademyofhair.com.principles.vc	theacademyofhair.com.principles.vc	C=US, O=Let's Encrypt, CN=R3