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

Results forcontroller.sset.putty.bio

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2026-01-11T10:21:05.059	2026-01-11T09:22:34	2026-04-11T09:22:33	ww25.controller.sset.putty.bio	ww25.controller.sset.putty.bio	C=US, O=Let's Encrypt, CN=R12
2026-01-11T10:21:04.153	2026-01-11T09:22:34	2026-04-11T09:22:33	ww25.controller.sset.putty.bio	ww25.controller.sset.putty.bio	C=US, O=Let's Encrypt, CN=R12
2025-02-01T01:21:29.074	2025-02-01T00:22:58	2025-05-02T00:22:57	controller.sset.putty.bio	controller.sset.putty.bio	C=US, O=Let's Encrypt, CN=R10
2025-02-01T01:21:28.417	2025-02-01T00:22:58	2025-05-02T00:22:57	controller.sset.putty.bio	controller.sset.putty.bio	C=US, O=Let's Encrypt, CN=R10