It can be anything! An apex, subdomain, or even a URL.
Domain Name: books.writeplus.aiDomain Status: No Object Found>>> Last update of WHOIS database: 2024-09-26T23:22:09.704Z <<<
Domain Name: books.writeplus.ai
Domain Status: No Object Found
>>> Last update of WHOIS database: 2024-09-26T23:22:09.704Z <<<