It can be anything! An apex, subdomain, or even a URL.
Domain Name: www.js.foolish.aiDomain Status: No Object Found>>> Last update of WHOIS database: 2024-09-20T17:28:17.968Z <<<
Domain Name: www.js.foolish.ai
Domain Status: No Object Found
>>> Last update of WHOIS database: 2024-09-20T17:28:17.968Z <<<