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

Results forbackup.operationdarkness.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-10-17T09:39:53.552	2025-10-17T08:41:23	2026-01-15T08:41:22	backup.operationdarkness.com	backup.operationdarkness.com	C=US, O=Let's Encrypt, CN=R13
2025-10-17T09:39:53.338	2025-10-17T08:41:23	2026-01-15T08:41:22	backup.operationdarkness.com	backup.operationdarkness.com	C=US, O=Let's Encrypt, CN=R13
2023-01-17T19:09:41.005	2023-01-17T18:09:40	2023-04-17T18:09:39	operationdarkness.com	*.operationdarkness.com	C=US, O=Let's Encrypt, CN=R3
2023-01-17T19:09:40.822	2023-01-17T18:09:40	2023-04-17T18:09:39	operationdarkness.com	*.operationdarkness.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T17:09:15.374	2022-11-18T16:09:14	2023-02-16T16:09:13	operationdarkness.com	*.operationdarkness.com	C=US, O=Let's Encrypt, CN=R3
2022-11-18T17:09:15.023	2022-11-18T16:09:14	2023-02-16T16:09:13	operationdarkness.com	*.operationdarkness.com	C=US, O=Let's Encrypt, CN=R3