Internet bills are increasing day by day and when you find out the bill if you wonder as to when do you use that much data, there is a big possibility that someone else has also paired through your Wi-Fi. There are various ways to check that, but the easiest way is through the good old command prompt. The fact about command prompt is that it’s one of the most powerful tool in the windows but also the most ignored too, people just love the GUI interface so much these days that they have seemed to forget this amazing tool.
To find out who is stealing all you have to do is
1) Open up your browser and visit http://192.168.1.1 or http://192.168.0.1 which depends on the router you use.
2) Reach the tab saying “Attached Devices” or something related to that
3) Find the computer name, IP address and MAC Address (sometimes called Physical Address or Hardware Address) of your computer using the command prompt by type ipconfig/ all
4) Compare it with those displayed by your router in Step 2. If you notice some weird devices attached then it would mean that someone else has been stealing your internet data and it is advisable to protect your Wi-Fi with a password.