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

Results for*.kahu.work

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-02-23T07:18:00.581	2020-02-13T00:00:00	2021-02-13T12:00:00	kahu.work	*.kahu.work	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-02-23T07:18:00.581	2020-02-13T00:00:00	2021-02-13T12:00:00	kahu.work	*.kahu.work	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-02-13T10:31:46.845	2020-02-13T00:00:00	2021-02-13T12:00:00	kahu.work	*.kahu.work	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-02-13T10:31:46.845	2020-02-13T00:00:00	2021-02-13T12:00:00	kahu.work	*.kahu.work	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1