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

Results formysql5.admin.server340.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2016-09-18T04:55:37.827	2011-02-10T09:28:53	2013-02-10T20:24:39	*.server340.com	mysql5.admin.server340.com	C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 2 Primary Intermediate Server CA
2015-01-26T15:20:46.65	2015-01-21T07:35:19	2017-01-21T19:45:47	*.server340.com	mysql5.admin.server340.com	C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 2 Primary Intermediate Server CA
2013-03-26T10:03:10.516	2013-01-26T15:47:12	2015-01-27T19:42:24	*.server340.com	mysql5.admin.server340.com	C=IL, O=StartCom Ltd., OU=Secure Digital Certificate Signing, CN=StartCom Class 2 Primary Intermediate Server CA