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

Results forapi.staging.simpleshowing.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-10-17T09:48:58.323	2020-02-07T00:00:00	2021-03-07T12:00:00	api.staging.simpleshowing.com	api.staging.simpleshowing.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon
2020-02-07T01:42:17.333	2020-02-07T00:00:00	2021-03-07T12:00:00	api.staging.simpleshowing.com	api.staging.simpleshowing.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon
2019-03-15T21:55:20.224	2019-03-06T00:00:00	2020-04-06T12:00:00	api.staging.simpleshowing.com	api.staging.simpleshowing.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon
2019-03-06T15:08:29.855	2019-03-06T00:00:00	2020-04-06T12:00:00	api.staging.simpleshowing.com	api.staging.simpleshowing.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon
2018-10-13T21:03:55.676	2018-10-10T00:00:00	2019-11-10T12:00:00	api.staging.simpleshowing.com	api.staging.simpleshowing.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon
2018-10-10T13:10:16.662	2018-10-10T00:00:00	2019-11-10T12:00:00	api.staging.simpleshowing.com	api.staging.simpleshowing.com	C=US, O=Amazon, OU=Server CA 1B, CN=Amazon