It can be anything! An apex, subdomain, or even a URL.
Domain Name: www.wiki.upshelf.aiDomain Status: No Object Found>>> Last update of WHOIS database: 2024-09-25T02:24:23.847Z <<<
Domain Name: www.wiki.upshelf.ai
Domain Status: No Object Found
>>> Last update of WHOIS database: 2024-09-25T02:24:23.847Z <<<