How to Determine the Wi-Fi Channels in Use Around You
Scan nearby networks to find the least crowded channel and reduce Wi-Fi interference.
Overview
Neighbouring Wi-Fi networks on the same channel cause interference and slow speeds. This guide shows how to scan the channels in use around you so you can switch your router to a clearer one.
Wi-Fi channels in use.
Key Takeaways
- Overlapping channels cause interference.
- On 2.4 GHz, channels 1, 6, and 11 are the non-overlapping choices.
- Free tools show which channels neighbours use.
- Pick the least crowded channel in your router settings.
Scan with WiFi Analyzer
Note: Install scanning tools only from official sources (Microsoft Store / the tool’s website).
1. Install "WiFi Analyzer" from the Microsoft Store (or a phone equivalent).
2. Open it to see nearby networks graphed by channel and signal strength.
3. Look at the 2.4 GHz view: aim for 1, 6, or 11 with the least overlap.
4. Check the 5 GHz view for wider, less crowded channels.
Scan with WifiInfoView
1. Download NirSoft WifiInfoView from the official site.
2. Run it to list every nearby network with its channel, band, and signal.
3. Sort by channel to see which are busiest.
Change Your Router’s Channel
1. Log in to your router (e.g., 192.168.0.1 or 192.168.1.1).
2. Open the wireless settings.
3. Set the 2.4 GHz channel to the least-used of 1/6/11.
4. Pick a clear 5 GHz channel, then save and reconnect.
Troubleshooting
Problem: All channels look busy.
Solution: Use the 5 GHz band, which has more non-overlapping channels and less congestion.
Problem: Auto channel keeps a crowded one.
Solution: Set the channel manually to 1, 6, or 11 (2.4 GHz) based on your scan.
Problem: No improvement after changing.
Solution: Interference may be non-Wi-Fi (microwaves, Bluetooth); try 5 GHz and reposition the router.
Problem: Tool shows no networks.
Solution: Enable Wi-Fi/location permissions the scanner needs, and ensure the adapter is on.
Conclusion
A quick scan with WiFi Analyzer or WifiInfoView reveals which channels your neighbours use. Move your router to the least crowded of 1/6/11 on 2.4 GHz — or better, use 5 GHz — to cut interference and improve speeds.
