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

Results fordigiqode-quicknotes.digiqode.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-10-12T06:42:32.935	2019-10-12T05:42:32	2020-01-10T05:42:32	*.digiqode.com	*.digiqode.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-10-12T06:42:32.73	2019-10-12T05:42:32	2020-01-10T05:42:32	*.digiqode.com	*.digiqode.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-10-12T05:48:49.562	2019-10-12T04:48:49	2020-01-10T04:48:49	*.digiqode.com	*.digiqode.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-10-12T05:48:49.432	2019-10-12T04:48:49	2020-01-10T04:48:49	*.digiqode.com	*.digiqode.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-10-12T05:46:09.327	2019-10-12T04:46:08	2020-01-10T04:46:08	*.digiqode.com	*.digiqode.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-10-12T05:46:08.721	2019-10-12T04:46:08	2020-01-10T04:46:08	*.digiqode.com	*.digiqode.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-02-22T08:42:55.806	2018-02-22T07:42:55	2018-05-23T07:42:55	digiqode-quicknotes.digiqode.com	digiqode-quicknotes.digiqode.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3