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

Results for*.shampoo.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2020-01-26T18:34:43.798	2011-03-15T14:40:55	2013-03-15T17:29:27	*.shampoo.com	*.shampoo.com	C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 2 Primary Intermediate Server CA
2020-01-26T18:34:43.798	2011-03-15T14:40:55	2013-03-15T17:29:27	*.shampoo.com	*.shampoo.com	C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 2 Primary Intermediate Server CA
2016-09-18T04:53:51.073	2011-10-26T10:19:01	2013-10-26T09:44:28	*.venisonjerky.com	*.shampoo.com	C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 2 Primary Intermediate Server CA
2016-09-18T04:53:51.073	2011-10-26T10:19:01	2013-10-26T09:44:28	*.venisonjerky.com	*.shampoo.com	C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 2 Primary Intermediate Server CA
2013-03-26T09:16:30.453	2012-03-06T20:26:43	2014-03-08T18:53:02	*.kites.com	*.shampoo.com	C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 2 Primary Intermediate Server CA
2013-03-26T09:16:30.453	2012-03-06T20:26:43	2014-03-08T18:53:02	*.kites.com	*.shampoo.com	C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 2 Primary Intermediate Server CA