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

Results forp-o.ac

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2019-08-11T09:26:06.922	2019-08-11T00:00:00	2020-08-11T23:59:59	p-o.ac	p-o.ac	C=FR, ST=Paris, L=Paris, O=Gandi, CN=Gandi Standard SSL CA 2
2019-08-11T09:25:46.228	2019-08-11T00:00:00	2020-08-11T23:59:59	p-o.ac	p-o.ac	C=FR, ST=Paris, L=Paris, O=Gandi, CN=Gandi Standard SSL CA 2
2019-06-26T20:23:13.337	2019-06-26T19:23:12	2019-09-24T19:23:12	p-o.ac	p-o.ac	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-06-26T20:23:12.325	2019-06-26T19:23:12	2019-09-24T19:23:12	p-o.ac	p-o.ac	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-04-29T07:15:17.522	2019-04-29T06:15:16	2019-07-28T06:15:16	www.forhire.net	p-o.ac	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-04-29T07:15:16.186	2019-04-29T06:15:16	2019-07-28T06:15:16	www.forhire.net	p-o.ac	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-03-01T11:13:49.273	2019-03-01T10:13:47	2019-05-30T10:13:47	app.esy.care	p-o.ac	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-03-01T11:13:47.893	2019-03-01T10:13:47	2019-05-30T10:13:47	app.esy.care	p-o.ac	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-03-01T09:01:29.071	2019-03-01T08:01:27	2019-05-30T08:01:27	p-o.ac	p-o.ac	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-03-01T09:01:28.011	2019-03-01T08:01:27	2019-05-30T08:01:27	p-o.ac	p-o.ac	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3