With a small freeware utility TCPView can the current network connections and open ports represent simple. TCPView runs under Windows and was written by Mark Russinovich (Sysinternals).
TCPView use
TCPView can be downloaded from the website Sysinternals. After unpacking the ZIP archive, the program can be started immediately. No installation is required. TCPView shows current use TCP and UDP endports of your system. At each port will use the associated message.
Screenshot TCPView
New session will be stored temporarily green, degraded compounds are shown in red briefly. In the last column shows the status of the connection TCPView (Listening, Established in). About the menus can be changed some settings from TCPView.
tcpvcon - The command line version
For the call of the command line there is the version tcpvcon.
D: \ Program Files \ TCPView> tcpvcon.exe-h
TCPView v2.34 - TCP / UDP endpoint lister
Copyright (C) 1998-2003 Mark Russinovich
Sysinternals - www.sysinternals.com
Tcpvcon displays TCP and UDP endpoints.
Usage: tcpvcon [-a] [-c] [n] [process name or PID]
-A Show all endpoints (default is to show established TCP
connections).
-C Print output as CSV.
-N Do not resolve addressed.
Only show process endpoints owned by the process specified.
tcpvcon eingnet for use in batch files. The option-a are also ports in LISTENING status.