How to list what applications running on a port ? /windows xp

Question

without using external tools..thanks

Answer 1

You can do it with the built-in NetStat.exe utility.

Just open Command Console (cmd.exe)

Then type:  netstat -a -b

Get help by typing "netstat help" in Cmd console.

Here is sample of results from my PC:

(some data omitted to save space here)

C:\Documents and Settings\User>netstat -a -b

Active Connections

  TCP    BigSky-1:4300          BigSky-1:0             LISTENING       4556

  [3CXVoIPClient.exe]

  TCP    BigSky-1:5061          BigSky-1:0             LISTENING       4556

  [3CXVoIPClient.exe]

  TCP    BigSky-1:5080          BigSky-1:0             LISTENING       324

  [3CXTunnel.exe]

  TCP    BigSky-1:5090          BigSky-1:0             LISTENING       324

  [3CXTunnel.exe]

   TCP    BigSky-1:39717         BigSky-1:0             LISTENING       3572

  [Skype.exe]

  TCP    BigSky-1:1056          po-in-f125.google.com:5222  ESTABLISHED     580

  [googletalk.exe]

  TCP    BigSky-1:4949          cg-in-f147.google.com:http  CLOSE_WAIT      3208

  [iexplore.exe]

  TCP    BigSky-1:4957          cg-in-f147.google.com:https  CLOSE_WAIT      3208

  [iexplore.exe]

  UDP    BigSky-1:39717         *:*                                    3572

  [Skype.exe]

  UDP    BigSky-1:5061          *:*                                    4556

  [3CXVoIPClient.exe]

  UDP    BigSky-1:5080          *:*                                    324

  [3CXTunnel.exe]

  UDP    BigSky-1:1047          *:*                                    3216

  [gnotify.exe]