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

Results forwww.code-editor.deltanow.tech

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-09-08T10:32:14.683	2021-09-08T09:32:14	2021-12-07T09:32:13	code-editor.deltanow.tech	code-editor.deltanow.tech	C=US, O=Let's Encrypt, CN=R3
2021-09-08T10:32:14.472	2021-09-08T09:32:14	2021-12-07T09:32:13	code-editor.deltanow.tech	code-editor.deltanow.tech	C=US, O=Let's Encrypt, CN=R3
2021-07-10T11:22:28.714	2021-07-10T10:22:28	2021-10-08T10:22:27	code-editor.deltanow.tech	code-editor.deltanow.tech	C=US, O=Let's Encrypt, CN=R3
2021-07-10T11:22:28.583	2021-07-10T10:22:28	2021-10-08T10:22:27	code-editor.deltanow.tech	code-editor.deltanow.tech	C=US, O=Let's Encrypt, CN=R3