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

Results for*.cmmi.org

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-04-13T02:21:47.206	2020-04-09T00:00:00	2021-04-10T12:00:00	cmmi.org	*.cmmi.org	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-04-13T02:21:47.206	2020-04-09T00:00:00	2021-04-10T12:00:00	cmmi.org	*.cmmi.org	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-04-09T22:54:23.604	2020-04-09T00:00:00	2021-04-10T12:00:00	cmmi.org	*.cmmi.org	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-04-09T22:54:23.604	2020-04-09T00:00:00	2021-04-10T12:00:00	cmmi.org	*.cmmi.org	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1