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

'Netsat' appears to be a misspelling of Netstat; Netstat provides only a static snapshot of connections at the moment the command is executed and does not update automatically in real time.

Loki is a security tool associated with covert channel analysis and rootkit detection, not a real-time utility for monitoring local TCP/UDP port states.

Nmap is a network scanner used to discover open ports on remote hosts through active probing, not a real-time monitor of connection state changes on the local system.

TCPView, part of the Microsoft Sysinternals suite, displays all active TCP and UDP connections with local and remote addresses, port numbers, and states such as LISTENING, ESTABLISHED, and CLOSE_WAIT, and updates the display in real time without requiring repeated manual execution. This makes it the appropriate tool when continuous, live port state monitoring is required.