Note: This article was originally published in 2012. Some steps, commands, or software versions may have changed. Check the current General documentation for the latest information.

In this step-by-step guide, you’ll learn identify which application is listening or opening a specific port on windows.

  1. Open Command Prompt window by typing Cmd in Run command box or Start Search, and hit Enter.
  2. Type in the following netstat command:

 

netstat -o -n -a | findstr :80 or netstat -aon | findstr :443

  Where the text after findstr is the text you want to find in the list of netstat. For example, in the first one you´ll find who has the port 80 open while on the second one you´ll find who is listening on port 443.

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Summary

You’ve successfully learned identify which application is listening or opening a specific port on windows. If you run into any issues, double-check the prerequisites and ensure your General environment is properly configured.