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

Results for*.marker.vc

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-10-13T20:05:40.514	2020-10-05T00:00:00	2021-10-06T12:00:00	marker.vc	*.marker.vc	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-10-13T20:05:40.514	2020-10-05T00:00:00	2021-10-06T12:00:00	marker.vc	*.marker.vc	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-10-05T09:52:34.726	2020-10-05T00:00:00	2021-10-06T12:00:00	marker.vc	*.marker.vc	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-10-05T09:52:34.726	2020-10-05T00:00:00	2021-10-06T12:00:00	marker.vc	*.marker.vc	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1