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

Results for*.vtegi.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2018-04-08T00:07:25.558	2018-03-31T00:00:00	2020-03-30T23:59:59	*.vtegi.com	*.vtegi.com	C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Domain Validation Secure Server CA
2018-04-08T00:07:25.558	2018-03-31T00:00:00	2020-03-30T23:59:59	*.vtegi.com	*.vtegi.com	C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Domain Validation Secure Server CA
2018-03-31T17:26:49.955	2018-03-31T00:00:00	2020-03-30T23:59:59	*.vtegi.com	*.vtegi.com	C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Domain Validation Secure Server CA
2018-03-31T17:26:49.955	2018-03-31T00:00:00	2020-03-30T23:59:59	*.vtegi.com	*.vtegi.com	C=GB, ST=Greater Manchester, L=Salford, O=COMODO CA Limited, CN=COMODO RSA Domain Validation Secure Server CA