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

Results for*.lightatom.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-06-08T18:42:46.592	2020-05-15T00:00:00	2021-05-16T12:00:00	lightatom.com	*.lightatom.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-06-08T18:42:46.592	2020-05-15T00:00:00	2021-05-16T12:00:00	lightatom.com	*.lightatom.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-05-15T01:17:56.805	2020-05-15T00:00:00	2021-05-16T12:00:00	lightatom.com	*.lightatom.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1
2020-05-15T01:17:56.805	2020-05-15T00:00:00	2021-05-16T12:00:00	lightatom.com	*.lightatom.com	C=US, O=DigiCert Inc, OU=www.digicert.com, CN=Encryption Everywhere DV TLS CA - G1