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

Results forwww.eca3year-sha2.identrust.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2016-10-29T11:58:11.089	2016-09-06T23:04:49	2019-09-06T23:04:49	eca3year-sha2.identrust.com	eca3year-sha2.identrust.com	C=US, O=U.S. Government, OU=ECA, OU=Certification Authorities, CN=IdenTrust ECA Component S21
2016-10-28T00:28:17.014	2016-07-15T20:37:16	2019-07-15T20:37:16	eca3year-sha2.identrust.com	eca3year-sha2.identrust.com	C=US, O=U.S. Government, OU=ECA, OU=Certification Authorities, CN=IdenTrust ECA Component S21
2016-10-28T00:28:08.146	2016-08-19T15:57:31	2019-08-19T15:57:31	eca3year-sha2.identrust.com	eca3year-sha2.identrust.com	C=US, O=U.S. Government, OU=ECA, OU=Certification Authorities, CN=IdenTrust ECA Component S21