Hi TIM MM,
Thank you for reaching out to the Microsoft Q&A Forum! I understand how concerning it can feel when you notice an unfamiliar device on your network. Let’s go through this step by step so you can feel confident about your Wi-Fi security.
Here are the 2 options that you can try to check who’s connected to your Wi-Fi, please kindly follow:
1 - Router Admin Page
- Open a browser and enter your router’s IP (often 192.168.0.1 or 192.168.1.1).
- Log in and look for Connected Devices or DHCP Client List.
- Compare the MAC addresses to your known devices.
2 - Command Prompt
- Press Win + R, type cmd, and run:
arp -a - This will list all IP and MAC addresses currently connected.
The IP address shown in your uploaded image is a private IP, which means it only exists inside your home network and can’t be traced on the internet. The key identifier here is the MAC address, which is unique to each device.
- Match the MAC address to your devices.
- The first part of the MAC often reveals the manufacturer, which can help identify the device.
If you find an unknown device, change your Wi-Fi password and enable WPA2/WPA3 encryption. You can also block the MAC address directly from your router.
Please let me know if there is anything else I can help you with. Also keep me updated on the result you found.
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