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

Results for*.cabuu.app

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2018-09-25T11:00:02.927	2018-09-25T00:00:00	2019-09-25T12:00:00	*.cabuu.app	*.cabuu.app	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2018-09-25T11:00:02.927	2018-09-25T00:00:00	2019-09-25T12:00:00	*.cabuu.app	*.cabuu.app	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2018-09-23T14:55:44.72	2018-09-20T00:00:00	2019-09-20T12:00:00	*.cabuu.app	*.cabuu.app	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2018-09-23T14:55:44.72	2018-09-20T00:00:00	2019-09-20T12:00:00	*.cabuu.app	*.cabuu.app	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2018-09-20T10:49:53.052	2018-09-20T00:00:00	2019-09-20T12:00:00	*.cabuu.app	*.cabuu.app	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2018-09-20T10:49:53.052	2018-09-20T00:00:00	2019-09-20T12:00:00	*.cabuu.app	*.cabuu.app	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1