Originally Posted by i2D
You can use Airmon-ng /w Airodump-ng , this will require specific hardware.
This will show client devices connected to APs and also client device searching for a AP to connect with.
Thanks for info.. what is the specific hardware required? and where can I get this from?
As well as using this on a static pc would it work with a mobile phone so that any devices would show up as the phone moved into their wifi ranges?