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

Results forohiotransit.accesssol.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-03-24T00:51:24.352	2019-03-23T23:51:23	2019-06-21T23:51:23	ohiotransit.accesssol.com	ohiotransit.accesssol.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-03-24T00:51:23.767	2019-03-23T23:51:23	2019-06-21T23:51:23	ohiotransit.accesssol.com	ohiotransit.accesssol.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-01-23T01:25:32.165	2019-01-23T00:25:31	2019-04-23T00:25:31	ohiotransit.accesssol.com	ohiotransit.accesssol.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-01-23T01:25:31.476	2019-01-23T00:25:31	2019-04-23T00:25:31	ohiotransit.accesssol.com	ohiotransit.accesssol.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-12-11T16:38:23.82	2018-12-11T15:38:22	2019-03-11T15:38:22	ohiotransit.accesssol.com	ohiotransit.accesssol.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2018-12-11T16:38:22.842	2018-12-11T15:38:22	2019-03-11T15:38:22	ohiotransit.accesssol.com	ohiotransit.accesssol.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3