It can be anything! An apex, subdomain, or even a URL.
Domain Name: mail.cetricka.co.keDomain Status: No Object Found>>> Last update of WHOIS database: 2024-09-21T17:34:07.819Z <<<
Domain Name: mail.cetricka.co.ke
Domain Status: No Object Found
>>> Last update of WHOIS database: 2024-09-21T17:34:07.819Z <<<