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

Results forwww.server.wlcuk.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2016-10-02T07:44:38.944	2012-08-29T14:09:12	2013-08-01T10:00:51	server.wlcuk.com	www.server.wlcuk.com	C=US, ST=Arizona, L=Scottsdale, O="Starfield Technologies, Inc.", OU=http://certificates.starfieldtech.com/repository, CN=Starfield Secure Certification Authority, serialNumber=10688435
2016-09-26T06:22:39.589	2012-08-01T10:00:51	2013-08-01T10:00:51	server.wlcuk.com	www.server.wlcuk.com	C=US, ST=Arizona, L=Scottsdale, O="Starfield Technologies, Inc.", OU=http://certificates.starfieldtech.com/repository, CN=Starfield Secure Certification Authority, serialNumber=10688435
2013-07-16T12:01:03.567	2013-07-15T10:16:59	2013-08-01T10:00:51	server.wlcuk.com	www.server.wlcuk.com	C=US, ST=Arizona, L=Scottsdale, O="Starfield Technologies, Inc.", OU=http://certificates.starfieldtech.com/repository, CN=Starfield Secure Certification Authority, serialNumber=10688435
2013-04-08T17:18:29.141	2012-10-29T13:57:06	2013-08-01T10:00:51	server.wlcuk.com	www.server.wlcuk.com	C=US, ST=Arizona, L=Scottsdale, O="Starfield Technologies, Inc.", OU=http://certificates.starfieldtech.com/repository, CN=Starfield Secure Certification Authority, serialNumber=10688435