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

Results forcom.resistant.vc

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2022-10-14T18:49:50.303	2022-10-14T17:49:49	2023-01-12T17:49:48	gratefulnessjoy.com.resistant.vc	gratefulnessjoy.com.resistant.vc	C=US, O=Let's Encrypt, CN=R3
2022-10-14T18:49:49.974	2022-10-14T17:49:49	2023-01-12T17:49:48	gratefulnessjoy.com.resistant.vc	gratefulnessjoy.com.resistant.vc	C=US, O=Let's Encrypt, CN=R3
2022-10-10T09:46:42.473	2022-10-10T08:46:41	2023-01-08T08:46:40	coir.ca	marketclubasia.com.resistant.vc	C=US, O=Let's Encrypt, CN=R3
2022-10-10T09:46:42.15	2022-10-10T08:46:41	2023-01-08T08:46:40	coir.ca	marketclubasia.com.resistant.vc	C=US, O=Let's Encrypt, CN=R3