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

Results for*.233128.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-05-06T19:20:14.38	2021-05-06T00:00:00	2022-05-06T23:59:59	233128.com	*.233128.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2021-05-06T19:20:14.38	2021-05-06T00:00:00	2022-05-06T23:59:59	233128.com	*.233128.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-04-24T02:44:30.94	2020-04-24T00:00:00	2021-04-25T12:00:00	233128.com	*.233128.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-04-24T02:44:30.94	2020-04-24T00:00:00	2021-04-25T12:00:00	233128.com	*.233128.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1