Checking your COM port in Windows 11 is a breeze! By following a few simple steps, you’ll be able to identify which port your device is using. Whether you’re troubleshooting hardware issues or setting up new peripherals, knowing how to find this information is essential. This guide walks you through each step, ensuring you can complete this task with ease.
How to Check COM Port in Windows 11
In this section, you’ll learn the process to check your COM port in Windows 11. We’ll cover each step with easy-to-follow instructions, so you can quickly and painlessly find the information you need.
Step 1: Open Device Manager
The first step is to open the Device Manager.
To do this, right-click on the Start button and select "Device Manager" from the context menu. The Device Manager window will open, displaying a list of all the hardware and peripherals connected to your computer.
Step 2: Locate Ports (COM & LPT)
Navigate to the "Ports (COM & LPT)" section in Device Manager.
In the Device Manager window, scroll down the list until you find the section labeled “Ports (COM & LPT).” Clicking the arrow next to it will expand the list, showing all the COM ports currently in use.
Step 3: Identify Your COM Port
Identify the COM port you are interested in.
Each COM port will be listed with a specific name and number, such as “COM1” or “COM3.” Make a note of the COM port you are investigating or using.
Step 4: Check Port Properties
Right-click on the COM port and select "Properties."
This will open a new window showing various details about the port, such as the status and settings. This information can be useful for troubleshooting or configuring hardware.
Step 5: Close the Device Manager
Now, close the Device Manager.
After you’ve gathered all the necessary information, you can close the Device Manager window by clicking the “X” in the top right corner.
After completing these steps, you’ll know which COM port your device is using and have access to its properties for further adjustments.
Tips for How to Check COM Port in Windows 11
- Regular Checks: Periodically check your COM ports to ensure all devices are functioning properly.
- Use Descriptive Names: Rename your devices in Device Manager for easier identification.
- Driver Updates: Always keep your drivers updated to avoid COM port issues.
- Check for Conflicts: Ensure no two devices are using the same COM port.
- Documentation: Keep a record of which devices are assigned to which COM ports for future reference.
Frequently Asked Questions About How to Check COM Port in Windows 11
What is a COM port?
A COM port is a serial communication interface through which data transfers in and out. It’s often used for connecting peripherals like mice, modems, and some printers.
How do I change the COM port number?
Right-click on the COM port in Device Manager, select "Properties," then go to the "Port Settings" tab. Click "Advanced" and you’ll find an option to change the COM port number.
Why can’t I see the Ports (COM & LPT) section in Device Manager?
If you can’t see this section, it might be because no COM ports are currently being used or recognized by your system. Ensure your devices are properly connected and drivers are installed.
Can I use a USB port as a COM port?
Yes, you can use a USB-to-serial adapter to create a virtual COM port, which can be useful for devices requiring a serial connection.
What should I do if my COM port is not working?
First, try updating the driver from the Device Manager. If that doesn’t help, check the device’s physical connection or consult the device manufacturer for support.
Summary of How to Check COM Port in Windows 11
- Open Device Manager.
- Locate Ports (COM & LPT).
- Identify Your COM Port.
- Check Port Properties.
- Close the Device Manager.
Conclusion
In conclusion, knowing how to check your COM port in Windows 11 is a handy skill that can save you a lot of time and frustration. Whether you are setting up new hardware or troubleshooting existing devices, this guide provides you with the steps you need to identify and manage your COM ports effectively.
Keeping your system’s hardware running smoothly is crucial, and regular checks on your COM ports can prevent potential issues. If you encounter any problems, the tips and FAQs sections should give you a good starting point for resolving them.
So next time you’re dealing with peripherals or serial devices, you’ll know exactly where to look and what to do. If you found this article helpful, feel free to share it with others who might benefit from understanding how to check COM port in Windows 11. Stay tuned for more tech tips and guides!

Kermit Matthews is a freelance writer based in Philadelphia, Pennsylvania with more than a decade of experience writing technology guides. He has a Bachelor’s and Master’s degree in Computer Science and has spent much of his professional career in IT management.
He specializes in writing content about iPhones, Android devices, Microsoft Office, and many other popular applications and devices.