It can be anything! An apex, subdomain, or even a URL.
Domain Name: www.appointment.spaak.aiDomain Status: No Object Found>>> Last update of WHOIS database: 2024-09-25T04:17:53.137Z <<<
Domain Name: www.appointment.spaak.ai
Domain Status: No Object Found
>>> Last update of WHOIS database: 2024-09-25T04:17:53.137Z <<<