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

Results forapi.yifanzhu.dev

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-10-29T12:22:04.702	2025-10-29T11:23:34	2026-01-27T11:23:33	api.yifanzhu.dev	api.yifanzhu.dev	C=US, O=Let's Encrypt, CN=R13
2025-10-29T12:22:04.562	2025-10-29T11:23:34	2026-01-27T11:23:33	api.yifanzhu.dev	api.yifanzhu.dev	C=US, O=Let's Encrypt, CN=R13
2025-10-29T12:21:58.855	2025-10-29T11:23:28	2026-01-27T11:23:27	*.yifanzhu.dev	*.yifanzhu.dev	C=US, O=Let's Encrypt, CN=R12
2025-10-29T12:21:58.581	2025-10-29T11:23:28	2026-01-27T11:23:27	*.yifanzhu.dev	*.yifanzhu.dev	C=US, O=Let's Encrypt, CN=R12
2025-10-02T01:59:03.839	2025-10-02T01:00:32	2025-12-31T01:00:31	api.yifanzhu.dev	api.yifanzhu.dev	C=US, O=Let's Encrypt, CN=R12
2025-10-02T01:59:03.521	2025-10-02T01:00:32	2025-12-31T01:00:31	api.yifanzhu.dev	api.yifanzhu.dev	C=US, O=Let's Encrypt, CN=R12