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

Results foripv6.main.serverhs.org

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-12-02T03:57:17.738	2025-12-02T02:58:46	2026-03-02T02:58:45	autoconfig.main.serverhs.org	ipv6.main.serverhs.org	C=US, O=Let's Encrypt, CN=R12
2025-12-02T03:57:16.839	2025-12-02T02:58:46	2026-03-02T02:58:45	autoconfig.main.serverhs.org	ipv6.main.serverhs.org	C=US, O=Let's Encrypt, CN=R12
2025-08-03T02:53:12.407	2025-08-03T01:54:42	2025-11-01T01:54:41	autoconfig.main.serverhs.org	ipv6.main.serverhs.org	C=US, O=Let's Encrypt, CN=R10
2025-08-03T02:53:12.096	2025-08-03T01:54:42	2025-11-01T01:54:41	autoconfig.main.serverhs.org	ipv6.main.serverhs.org	C=US, O=Let's Encrypt, CN=R10
2025-04-04T10:58:06.155	2025-04-04T09:59:34	2025-07-03T09:59:33	main.serverhs.org	ipv6.main.serverhs.org	C=US, O=Let's Encrypt, CN=R10
2025-04-04T10:58:05.191	2025-04-04T09:59:34	2025-07-03T09:59:33	main.serverhs.org	ipv6.main.serverhs.org	C=US, O=Let's Encrypt, CN=R10