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

Results for*.xtcn.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2016-03-24T12:57:08.974	2016-02-07T23:25:59	2018-02-07T23:25:59	*.xtcn.com	*.xtcn.com	C=IL, O=StartCom Ltd., OU=StartCom Certification Authority, CN=StartCom Class 2 IV Server CA
2016-03-24T12:57:08.974	2016-02-07T23:25:59	2018-02-07T23:25:59	*.xtcn.com	*.xtcn.com	C=IL, O=StartCom Ltd., OU=StartCom Certification Authority, CN=StartCom Class 2 IV Server CA
2015-08-23T07:34:33.119	2014-02-05T22:42:18	2016-02-07T20:09:48	*.xtcn.com	*.xtcn.com	C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 2 Primary Intermediate Server CA
2015-08-23T07:34:33.119	2014-02-05T22:42:18	2016-02-07T20:09:48	*.xtcn.com	*.xtcn.com	C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 2 Primary Intermediate Server CA