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

Netstat is a command-line utility available across various operating systems that provides a snapshot of network connections and listening ports at the time of execution, but it does not offer a continuous, real-time graphical update like TCPView.

TCPView is a Sysinternals utility for Windows that provides a continuously updating, real-time list of all active TCP and UDP connections and listening ports. It displays the local and remote addresses, connection state, and the name of the process that owns each endpoint, making it ideal for live monitoring.

Nmap (Network Mapper) is primarily a network scanning tool used to discover hosts and services on a computer network by sending packets and analyzing their responses, typically used for external reconnaissance rather than real-time monitoring of local system ports.

Loki is a host-based scanner designed to detect indicators of compromise (IOCs) on a system, such as known malware artifacts or suspicious processes, but it is not a real-time network connection monitoring utility.