It can be anything! An apex, subdomain, or even a URL.
Domain Name: agent.rtm.vnlp.aiDomain Status: No Object Found>>> Last update of WHOIS database: 2024-09-21T02:49:05.715Z <<<
Domain Name: agent.rtm.vnlp.ai
Domain Status: No Object Found
>>> Last update of WHOIS database: 2024-09-21T02:49:05.715Z <<<