Everyone in my neighborhood is so close, and along with XFinity routers, everyone attaches to everyone else’s Bluetooth and WiFi without much thought at all over various times.
When I wanted to monitor my WiFi I used one of my favorite tools Wireless Network Watcher from NirSoft. I had forgotten one of their other cute little tools WakeMeOnLan which will allow me to shut off my computers and wake them up prior to getting up in the morning. Inexplicably difficult on the BIOS anymore.
Wireless Network Watcher is a small utility that scans your wireless network and displays the list of all computers and devices that are currently connected to your network.
For every computer or device that is connected to your network, the following information is displayed: IP address, MAC address, the company that manufactured the network card, and optionally the computer name.
You can also export the connected devices list into html/xml/csv/text file, or copy the list to the clipboard and then paste into Excel or other spreadsheet application.