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

Results forww25.mail.monkeycheat2.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2024-11-02T02:24:42.37	2024-11-02T01:26:11	2025-01-31T01:26:10	ww25.mail.monkeycheat2.com	ww25.mail.monkeycheat2.com	C=US, O=Let's Encrypt, CN=R10
2024-11-02T02:24:41.554	2024-11-02T01:26:11	2025-01-31T01:26:10	ww25.mail.monkeycheat2.com	ww25.mail.monkeycheat2.com	C=US, O=Let's Encrypt, CN=R10
2024-08-01T08:47:59.043	2024-08-01T07:47:58	2024-10-30T07:47:57	ww25.mail.monkeycheat2.com	ww25.mail.monkeycheat2.com	C=US, O=Let's Encrypt, CN=R10
2024-08-01T08:47:58.921	2024-08-01T07:47:58	2024-10-30T07:47:57	ww25.mail.monkeycheat2.com	ww25.mail.monkeycheat2.com	C=US, O=Let's Encrypt, CN=R10