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

Results formx-3.rightbox.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-12-16T02:19:47.307	2025-12-16T01:21:15	2026-03-16T01:21:14	*.rightbox.com	*.rightbox.com	C=US, O=Let's Encrypt, CN=R13
2025-12-16T02:19:46.062	2025-12-16T01:21:15	2026-03-16T01:21:14	*.rightbox.com	*.rightbox.com	C=US, O=Let's Encrypt, CN=R13
2025-10-15T01:20:20.896	2025-10-15T00:21:48	2026-01-13T00:21:47	*.rightbox.com	*.rightbox.com	C=US, O=Let's Encrypt, CN=R12
2025-10-15T01:20:18.655	2025-10-15T00:21:48	2026-01-13T00:21:47	*.rightbox.com	*.rightbox.com	C=US, O=Let's Encrypt, CN=R12
2025-08-11T00:21:51.35	2025-08-10T23:23:20	2025-11-08T23:23:19	*.rightbox.com	*.rightbox.com	C=US, O=Let's Encrypt, CN=R10
2025-08-11T00:21:50.955	2025-08-10T23:23:20	2025-11-08T23:23:19	*.rightbox.com	*.rightbox.com	C=US, O=Let's Encrypt, CN=R10