It can be anything! An apex, subdomain, or even a URL.
Domain Name: www.advisory.aider.aiDomain Status: No Object Found>>> Last update of WHOIS database: 2024-09-21T14:31:07.554Z <<<
Domain Name: www.advisory.aider.ai
Domain Status: No Object Found
>>> Last update of WHOIS database: 2024-09-21T14:31:07.554Z <<<