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

Results for*.systemswestengineers.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2023-03-02T19:38:32.696	2023-03-02T18:38:32	2023-05-31T18:38:31	*.systemswestengineers.com	*.systemswestengineers.com	C=US, O=Let's Encrypt, CN=R3
2023-03-02T19:38:32.696	2023-03-02T18:38:32	2023-05-31T18:38:31	*.systemswestengineers.com	*.systemswestengineers.com	C=US, O=Let's Encrypt, CN=R3
2023-03-02T19:38:32.406	2023-03-02T18:38:32	2023-05-31T18:38:31	*.systemswestengineers.com	*.systemswestengineers.com	C=US, O=Let's Encrypt, CN=R3
2023-03-02T19:38:32.406	2023-03-02T18:38:32	2023-05-31T18:38:31	*.systemswestengineers.com	*.systemswestengineers.com	C=US, O=Let's Encrypt, CN=R3