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

Results forwww.playbc.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-07-16T09:21:09.221	2020-07-16T08:21:08	2020-10-14T08:21:08	themagnetstore.com	www.playbc.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2020-07-16T09:21:09.006	2020-07-16T08:21:08	2020-10-14T08:21:08	themagnetstore.com	www.playbc.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-07-08T09:14:44.752	2019-07-08T08:14:43	2019-10-06T08:14:43	creditroof.com	www.playbc.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-07-08T09:14:44.012	2019-07-08T08:14:43	2019-10-06T08:14:43	creditroof.com	www.playbc.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-07-08T09:14:32.866	2019-07-08T08:14:31	2019-10-06T08:14:31	www.braincentre.com	www.playbc.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-07-08T09:14:31.999	2019-07-08T08:14:31	2019-10-06T08:14:31	www.braincentre.com	www.playbc.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-03-15T01:23:30.814	2019-03-15T00:23:30	2019-06-13T00:23:30	eczema.me	www.playbc.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3
2019-03-15T01:23:30.252	2019-03-15T00:23:30	2019-06-13T00:23:30	eczema.me	www.playbc.com	C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3