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

Results forww25.admin.runningrss.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2024-11-22T12:34:04.864	2024-11-22T11:35:33	2025-02-20T11:35:32	ww25.admin.runningrss.com	ww25.admin.runningrss.com	C=US, O=Let's Encrypt, CN=R10
2024-11-22T12:34:03.982	2024-11-22T11:35:33	2025-02-20T11:35:32	ww25.admin.runningrss.com	ww25.admin.runningrss.com	C=US, O=Let's Encrypt, CN=R10
2024-08-24T08:24:12.354	2024-08-24T07:25:41	2024-11-22T07:25:40	ww25.admin.runningrss.com	ww25.admin.runningrss.com	C=US, O=Let's Encrypt, CN=R11
2024-08-24T08:24:11.908	2024-08-24T07:25:41	2024-11-22T07:25:40	ww25.admin.runningrss.com	ww25.admin.runningrss.com	C=US, O=Let's Encrypt, CN=R11