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

Results forkf.flagler.tech

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2023-02-01T21:23:15.811	2023-02-01T20:23:15	2023-05-02T20:23:14	kf.flagler.tech	kf.flagler.tech	C=US, O=Let's Encrypt, CN=R3
2023-02-01T21:23:15.72	2023-02-01T20:23:15	2023-05-02T20:23:14	kf.flagler.tech	kf.flagler.tech	C=US, O=Let's Encrypt, CN=R3
2022-08-02T03:15:51.81	2022-08-02T02:15:51	2022-10-31T02:15:50	kf.flagler.tech	kf.flagler.tech	C=US, O=Let's Encrypt, CN=R3
2022-08-02T03:15:51.207	2022-08-02T02:15:51	2022-10-31T02:15:50	kf.flagler.tech	kf.flagler.tech	C=US, O=Let's Encrypt, CN=R3
2021-11-01T15:04:26.435	2021-11-01T14:04:25	2022-01-30T14:04:24	kf.flagler.tech	kf.flagler.tech	C=US, O=Let's Encrypt, CN=R3
2021-11-01T15:04:25.787	2021-11-01T14:04:25	2022-01-30T14:04:24	kf.flagler.tech	kf.flagler.tech	C=US, O=Let's Encrypt, CN=R3