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

Results formx.completeaccesssolutions.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-10-05T23:22:58.28	2021-10-05T00:00:00	2022-10-05T23:59:59	a.mx.completeaccesssolutions.com	a.mx.completeaccesssolutions.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2021-08-14T23:06:57.5	2021-08-04T00:00:00	2022-08-04T23:59:59	completeaccesssolutions.com	*.completeaccesssolutions.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2021-08-04T20:36:52.46	2021-08-04T00:00:00	2022-08-04T23:59:59	completeaccesssolutions.com	*.completeaccesssolutions.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1