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

Results forww17.server.expression.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-12-19T17:40:26.154	2025-12-19T00:00:00	2026-03-19T23:59:59	ww17.server.expression.com	ww17.server.expression.com	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
2025-12-19T17:40:24.506	2025-12-19T00:00:00	2026-03-19T23:59:59	ww17.server.expression.com	ww17.server.expression.com	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
2025-09-16T08:11:30.841	2025-09-16T00:00:00	2025-12-15T23:59:59	ww17.server.expression.com	ww17.server.expression.com	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
2025-09-16T08:11:30.166	2025-09-16T00:00:00	2025-12-15T23:59:59	ww17.server.expression.com	ww17.server.expression.com	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
2025-09-16T08:08:14.247	2025-09-16T00:00:00	2025-12-15T23:59:59	ww17.server.expression.com	ww17.server.expression.com	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
2025-09-16T08:08:13.493	2025-09-16T00:00:00	2025-12-15T23:59:59	ww17.server.expression.com	ww17.server.expression.com	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA