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

Results fordev-chartservice.oceangoal.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-01-17T02:18:16.867	2019-01-17T01:18:16	2019-04-17T01:18:16	dev-chartservice.oceangoal.com	dev-chartservice.oceangoal.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-01-17T02:18:16.28	2019-01-17T01:18:16	2019-04-17T01:18:16	dev-chartservice.oceangoal.com	dev-chartservice.oceangoal.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-01-07T01:17:25.281	2019-01-07T00:17:24	2019-04-07T00:17:24	dev-chartservice.oceangoal.com	dev-chartservice.oceangoal.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-01-07T01:17:24.716	2019-01-07T00:17:24	2019-04-07T00:17:24	dev-chartservice.oceangoal.com	dev-chartservice.oceangoal.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3