How to Tell If Someone Is Using Your WiFi
If your internet feels slow or you suspect an intruder, check your router's connected device list. Here's how to find out and what to do.
Updated 2026
-
1
Check the router's device list
Log into the router admin panel (open your gateway IP, e.g.
http://192.168.1.1). Look for Connected Devices or DHCP Client List. -
2
Identify every device
Go through each entry. Devices show a hostname and MAC address. Compare with your known devices — phones, laptops, TVs, smart plugs.
-
3
Look for warning signs
High data usage at odd hours, unknown device names, or more devices than you own are red flags.
-
4
Kick the intruder off
Change your WiFi password immediately. Every device, including the unauthorised one, will be disconnected and must re-enter the new password.
-
5
Prevent it happening again
Use WPA3 or WPA2 with a strong, unique password. Set up a guest network for visitors so they never have your main password.