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

Results forr.rg.net

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-11-01T02:36:09.232	2025-11-01T01:37:36	2026-01-30T01:37:35	r.rg.net	r.rg.net	C=US, O=Let's Encrypt, CN=R12
2025-11-01T02:36:06.978	2025-11-01T01:37:36	2026-01-30T01:37:35	r.rg.net	r.rg.net	C=US, O=Let's Encrypt, CN=R12
2025-09-01T02:36:06.029	2025-09-01T01:37:35	2025-11-30T01:37:34	r.rg.net	r.rg.net	C=US, O=Let's Encrypt, CN=R13
2025-09-01T02:36:05.809	2025-09-01T01:37:35	2025-11-30T01:37:34	r.rg.net	r.rg.net	C=US, O=Let's Encrypt, CN=R13
2025-07-19T23:04:53.72	2025-07-19T22:06:23	2025-10-17T22:06:22	r.rg.net	r.rg.net	C=US, O=Let's Encrypt, CN=R10
2025-07-19T23:04:53.459	2025-07-19T22:06:23	2025-10-17T22:06:22	r.rg.net	r.rg.net	C=US, O=Let's Encrypt, CN=R10