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

Results for*.hirebrain.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2018-09-27T23:07:58.408	2018-09-27T00:00:00	2019-09-27T23:59:59	*.hirebrain.com	*.hirebrain.com	C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Domain Validation Secure Server CA
2018-09-27T23:07:58.408	2018-09-27T00:00:00	2019-09-27T23:59:59	*.hirebrain.com	*.hirebrain.com	C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Domain Validation Secure Server CA
2018-09-27T23:07:43.979	2018-09-27T00:00:00	2019-09-27T23:59:59	*.hirebrain.com	*.hirebrain.com	C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Domain Validation Secure Server CA
2018-09-27T23:07:43.979	2018-09-27T00:00:00	2019-09-27T23:59:59	*.hirebrain.com	*.hirebrain.com	C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Domain Validation Secure Server CA