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

Results forkasmail.kassserver.com

Logged At	Not Before	Not After	Common Name	Matching Identities	Issuer Name
2025-10-21T22:18:15.654	2025-10-21T00:00:00	2026-01-19T23:59:59	kasmail.kassserver.com	kasmail.kassserver.com	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
2025-10-21T22:17:44.588	2025-10-21T00:00:00	2026-01-19T23:59:59	kasmail.kassserver.com	kasmail.kassserver.com	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
2025-06-25T07:48:47.229	2025-06-25T00:00:00	2025-09-23T23:59:59	kasmail.kassserver.com	kasmail.kassserver.com	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
2025-06-25T07:48:46.223	2025-06-25T00:00:00	2025-09-23T23:59:59	kasmail.kassserver.com	kasmail.kassserver.com	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
2025-06-25T07:44:44.191	2025-06-25T00:00:00	2025-09-23T23:59:59	kasmail.kassserver.com	kasmail.kassserver.com	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
2025-06-25T07:44:43.56	2025-06-25T00:00:00	2025-09-23T23:59:59	kasmail.kassserver.com	kasmail.kassserver.com	C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA