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

Results forapi.canaby.app

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-07-07T03:17:30.787	2020-07-07T02:17:30	2020-10-05T02:17:30	api.canaby.app	api.canaby.app	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-07-07T03:17:30.647	2020-07-07T02:17:30	2020-10-05T02:17:30	api.canaby.app	api.canaby.app	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-05-08T04:17:07.21	2020-05-08T03:17:06	2020-08-06T03:17:06	api.canaby.app	api.canaby.app	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-05-08T04:17:07.077	2020-05-08T03:17:06	2020-08-06T03:17:06	api.canaby.app	api.canaby.app	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-03-09T23:55:26.563	2020-03-09T22:55:26	2020-06-07T22:55:26	api.canaby.app	api.canaby.app	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-03-09T23:55:26.394	2020-03-09T22:55:26	2020-06-07T22:55:26	api.canaby.app	api.canaby.app	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-03-09T05:16:43.576	2020-03-09T04:16:43	2020-06-07T04:16:43	api.canaby.app	api.canaby.app	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-03-09T05:16:43.323	2020-03-09T04:16:43	2020-06-07T04:16:43	api.canaby.app	api.canaby.app	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3