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

Results for*.digitalgrub.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2018-09-19T06:59:59.321	2018-09-19T05:59:58	2018-12-18T05:59:58	*.digitalgrub.com	*.digitalgrub.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-09-19T06:59:59.321	2018-09-19T05:59:58	2018-12-18T05:59:58	*.digitalgrub.com	*.digitalgrub.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-09-19T06:59:58.599	2018-09-19T05:59:58	2018-12-18T05:59:58	*.digitalgrub.com	*.digitalgrub.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-09-19T06:59:58.599	2018-09-19T05:59:58	2018-12-18T05:59:58	*.digitalgrub.com	*.digitalgrub.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-07-09T11:28:12.323	2018-07-09T10:28:11	2018-10-07T10:28:11	*.digitalgrub.com	*.digitalgrub.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-07-09T11:28:12.323	2018-07-09T10:28:11	2018-10-07T10:28:11	*.digitalgrub.com	*.digitalgrub.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-07-09T11:28:11.701	2018-07-09T10:28:11	2018-10-07T10:28:11	*.digitalgrub.com	*.digitalgrub.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-07-09T11:28:11.701	2018-07-09T10:28:11	2018-10-07T10:28:11	*.digitalgrub.com	*.digitalgrub.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3