It can be anything! An apex, subdomain, or even a URL.
Domain Name: a.nic.nfDomain Status: No Object Found>>> Last update of WHOIS database: 2024-09-20T09:21:07.685Z <<<
Domain Name: a.nic.nf
Domain Status: No Object Found
>>> Last update of WHOIS database: 2024-09-20T09:21:07.685Z <<<