Which utility will tell you in real time which ports are listening or in another state?

Netstat (likely intended here, as 'Netsat' is a misspelling) produces a static point-in-time snapshot of connections and requires manual re-execution to see changes, so it does not provide a real-time continuous display.

Loki is a tool designed to detect covert channels over ICMP, not a general-purpose utility for monitoring local TCP/UDP port states.

Nmap is an active network scanner used for host discovery and port enumeration on remote targets, not a real-time live monitor of local port states.

TCPView (part of the Microsoft Sysinternals suite) displays a live, dynamically updated list of all TCP and UDP connections on the local system, including local and remote addresses, port numbers, and real-time connection states such as LISTENING, ESTABLISHED, and CLOSE_WAIT. Its continuous refresh capability makes it the correct tool when you need to observe port states as they change in real time.