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

Results for*.vuicall.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-08-17T14:09:58.635	2021-07-10T00:00:00	2022-07-10T23:59:59	vuicall.com	*.vuicall.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2021-08-17T14:09:58.635	2021-07-10T00:00:00	2022-07-10T23:59:59	vuicall.com	*.vuicall.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2021-07-10T10:10:13.605	2021-07-10T00:00:00	2022-07-10T23:59:59	vuicall.com	*.vuicall.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2021-07-10T10:10:13.605	2021-07-10T00:00:00	2022-07-10T23:59:59	vuicall.com	*.vuicall.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1