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

Results fordougtest2020.networklayer.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-08-21T12:52:09.407	2020-08-21T00:00:00	2021-08-26T12:00:00	dougtest2020.networklayer.com	dougtest2020.networklayer.com	C=US, O=DigiCert Inc, CN=DigiCert SHA2 Secure Server CA
2020-08-21T09:48:51.727	2020-08-21T00:00:00	2021-08-26T12:00:00	dougtest2020.networklayer.com	dougtest2020.networklayer.com	C=US, O=DigiCert Inc, CN=DigiCert SHA2 Secure Server CA
2020-08-20T18:30:44.603	2020-08-20T00:00:00	2021-08-25T12:00:00	dougtest2020.networklayer.com	dougtest2020.networklayer.com	C=US, O=DigiCert Inc, CN=DigiCert SHA2 Secure Server CA
2020-08-17T14:37:52.88	2020-08-17T00:00:00	2021-08-25T12:00:00	dougtest2020.networklayer.com	dougtest2020.networklayer.com	C=US, O=DigiCert Inc, CN=DigiCert SHA2 Secure Server CA