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

Results forwww.cloud-compare-api.manishk.dev

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2022-11-26T15:51:11.197	2022-11-26T14:51:10	2023-02-24T14:51:09	cloud-compare-api.manishk.dev	cloud-compare-api.manishk.dev	C=US, O=Let's Encrypt, CN=R3
2022-11-26T15:51:10.829	2022-11-26T14:51:10	2023-02-24T14:51:09	cloud-compare-api.manishk.dev	cloud-compare-api.manishk.dev	C=US, O=Let's Encrypt, CN=R3
2022-09-27T05:39:27.668	2022-09-27T04:39:27	2022-12-26T04:39:26	cloud-compare-api.manishk.dev	cloud-compare-api.manishk.dev	C=US, O=Let's Encrypt, CN=R3
2022-09-27T05:39:27.469	2022-09-27T04:39:27	2022-12-26T04:39:26	cloud-compare-api.manishk.dev	cloud-compare-api.manishk.dev	C=US, O=Let's Encrypt, CN=R3