Open Command Prompt and type `ipconfig`
Look for the `IPv4 Address` under your active network adapter
On macOS, open Terminal and type `ifconfig`
Look for the `inet` value under your active network interface
On Linux, open Terminal and type `ip addr`
Look for the `inet` address under your active network interface
Open Network Settings on your system
Check the details of the connected Wi-Fi or Ethernet network
Visit a website such as `whatismyip.com` to find your public IP address