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

Results forstaging-auth-api.worknode.ai

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2021-10-14T17:54:41.084	2021-10-14T16:54:40	2022-01-12T16:54:39	staging-auth-api.worknode.ai	staging-auth-api.worknode.ai	C=US, O=Let's Encrypt, CN=R3
2021-10-14T17:54:40.905	2021-10-14T16:54:40	2022-01-12T16:54:39	staging-auth-api.worknode.ai	staging-auth-api.worknode.ai	C=US, O=Let's Encrypt, CN=R3
2021-10-04T01:04:18.482	2021-10-04T00:04:17	2022-01-02T00:04:16	staging-auth-api.worknode.ai	staging-auth-api.worknode.ai	C=US, O=Let's Encrypt, CN=R3
2021-10-04T01:04:17.753	2021-10-04T00:04:17	2022-01-02T00:04:16	staging-auth-api.worknode.ai	staging-auth-api.worknode.ai	C=US, O=Let's Encrypt, CN=R3
2021-08-04T16:34:03.868	2021-08-04T15:34:03	2021-11-02T15:34:01	staging-auth-api.worknode.ai	staging-auth-api.worknode.ai	C=US, O=Let's Encrypt, CN=R3
2021-08-04T16:34:03.671	2021-08-04T15:34:03	2021-11-02T15:34:01	staging-auth-api.worknode.ai	staging-auth-api.worknode.ai	C=US, O=Let's Encrypt, CN=R3