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

Results forww25.test.mirrorstack.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2026-01-21T13:22:08.02	2026-01-21T12:23:37	2026-04-21T12:23:36	ww25.test.mirrorstack.com	ww25.test.mirrorstack.com	C=US, O=Let's Encrypt, CN=R12
2026-01-21T13:22:07.859	2026-01-21T12:23:37	2026-04-21T12:23:36	ww25.test.mirrorstack.com	ww25.test.mirrorstack.com	C=US, O=Let's Encrypt, CN=R12
2025-10-23T00:23:51.702	2025-10-22T23:25:19	2026-01-20T23:25:18	ww25.test.mirrorstack.com	ww25.test.mirrorstack.com	C=US, O=Let's Encrypt, CN=R12
2025-10-23T00:23:49.46	2025-10-22T23:25:19	2026-01-20T23:25:18	ww25.test.mirrorstack.com	ww25.test.mirrorstack.com	C=US, O=Let's Encrypt, CN=R12
2025-05-09T14:29:10.423	2025-05-09T13:30:38	2025-08-07T13:30:37	ww25.test.mirrorstack.com	ww25.test.mirrorstack.com	C=US, O=Let's Encrypt, CN=R10
2025-05-09T14:29:08.387	2025-05-09T13:30:38	2025-08-07T13:30:37	ww25.test.mirrorstack.com	ww25.test.mirrorstack.com	C=US, O=Let's Encrypt, CN=R10