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

Results for*.whytense.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-11-11T12:45:53.561	2019-11-06T00:00:00	2020-11-06T12:00:00	whytense.com	*.whytense.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2019-11-11T12:45:53.561	2019-11-06T00:00:00	2020-11-06T12:00:00	whytense.com	*.whytense.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2019-11-06T09:02:07.081	2019-11-06T00:00:00	2020-11-06T12:00:00	whytense.com	*.whytense.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2019-11-06T09:02:07.081	2019-11-06T00:00:00	2020-11-06T12:00:00	whytense.com	*.whytense.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1