how do i tell who all is hooked up to my internet

[cliffordgreene123]

how do i tell if some one is using my internet

 

[Ralston18]

Do you have admin rights to your router?

Many routers provide a diagram or list of connected devices.

You can also use "nmap" via the command prompt. Or a third party utility such as Nmap-Zenmap (free) to do the same.

Do be careful about downloading such utilities as they often try to install other applications and/or change your system configuration. E.g., change the default browser perhaps...

Likewise you can use "arp -a" and "netstat" via the command prompt to get a list of devices that your computer has actively communicated with.

Key is being able to recognize your own devices via their device name and MAC.

And, as always, be proactive with strong passwords and encryption for your network. Be sure to change any default (factory) settings.