It can be anything! An apex, subdomain, or even a URL.
Domain Name: dev-app.paperbox.aiDomain Status: No Object Found>>> Last update of WHOIS database: 2024-09-22T06:43:34.503Z <<<
Domain Name: dev-app.paperbox.ai
Domain Status: No Object Found
>>> Last update of WHOIS database: 2024-09-22T06:43:34.503Z <<<