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

Results forcore.janmir.app

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-04-13T22:02:47.025	2021-04-13T21:02:46	2021-07-12T21:02:46	core.janmir.app	core.janmir.app	C=US, O=Let's Encrypt, CN=R3
2021-04-13T22:02:46.536	2021-04-13T21:02:46	2021-07-12T21:02:46	core.janmir.app	core.janmir.app	C=US, O=Let's Encrypt, CN=R3
2021-02-12T22:02:38.816	2021-02-12T21:02:38	2021-05-13T21:02:38	core.janmir.app	core.janmir.app	C=US, O=Let's Encrypt, CN=R3
2021-02-12T22:02:38.699	2021-02-12T21:02:38	2021-05-13T21:02:38	core.janmir.app	core.janmir.app	C=US, O=Let's Encrypt, CN=R3
2020-12-14T13:49:14.976	2020-12-14T12:49:14	2021-03-14T12:49:14	core.janmir.app	core.janmir.app	C=US, O=Let's Encrypt, CN=R3
2020-12-14T13:49:14.827	2020-12-14T12:49:14	2021-03-14T12:49:14	core.janmir.app	core.janmir.app	C=US, O=Let's Encrypt, CN=R3