What port is a given program using? [closed]

netstat -b -a lists the ports in use and gives you the executable that's using each one. I believe you need to be in the administrator group to do this, and I don't know what security implications there are on Vista.

I usually add -n as well to make it a little faster, but adding -b can make it quite slow.

Edit: If you need more functionality than netstat provides, vasac suggests that you try TCPView.

TCPView can do what you asked for.

On Vista, you do need elevated privileges to use the -b option with netstat. To get around that, you could run "netstat -ano" which will show all open ports along with the associated process id. You could then use tasklist to lookup which process has the corresponding id.

C:\>netstat -anoActive Connections  Proto  Local Address          Foreign Address        State           PID  ...  TCP    [::]:49335             [::]:0                 LISTENING       1056  ...C:\>tasklist /fi "pid eq 1056"Image Name                     PID Session Name        Session#    Mem Usage========================= ======== ================ =========== ============sqlservr.exe                  1056 Services                   0     66,192 K