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

Results for*.midrange.de

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-12-20T08:23:17.302	2019-12-20T07:23:17	2020-03-19T07:23:17	*.midrange.de	*.midrange.de	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-12-20T08:23:17.302	2019-12-20T07:23:17	2020-03-19T07:23:17	*.midrange.de	*.midrange.de	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-12-20T08:23:17.097	2019-12-20T07:23:17	2020-03-19T07:23:17	*.midrange.de	*.midrange.de	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-12-20T08:23:17.097	2019-12-20T07:23:17	2020-03-19T07:23:17	*.midrange.de	*.midrange.de	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-10-10T13:27:58.512	2019-10-10T12:27:58	2020-01-08T12:27:58	*.midrange.de	*.midrange.de	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-10-10T13:27:58.512	2019-10-10T12:27:58	2020-01-08T12:27:58	*.midrange.de	*.midrange.de	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-10-10T13:27:58.382	2019-10-10T12:27:58	2020-01-08T12:27:58	*.midrange.de	*.midrange.de	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-10-10T13:27:58.382	2019-10-10T12:27:58	2020-01-08T12:27:58	*.midrange.de	*.midrange.de	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3