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

Results forwebdisk.wp1.serverstep.co

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-12-16T20:17:44.63	2025-12-16T19:19:14	2026-03-16T19:19:13	autoconfig.wp1.serverstep.co	webdisk.wp1.serverstep.co	C=US, O=Let's Encrypt, CN=R13
2025-12-16T20:17:44.308	2025-12-16T19:19:14	2026-03-16T19:19:13	autoconfig.wp1.serverstep.co	webdisk.wp1.serverstep.co	C=US, O=Let's Encrypt, CN=R13
2025-10-16T14:45:08.226	2025-10-16T13:46:37	2026-01-14T13:46:36	autoconfig.wp1.serverstep.co	webdisk.wp1.serverstep.co	C=US, O=Let's Encrypt, CN=R13
2025-10-16T14:45:07.933	2025-10-16T13:46:37	2026-01-14T13:46:36	autoconfig.wp1.serverstep.co	webdisk.wp1.serverstep.co	C=US, O=Let's Encrypt, CN=R13