On Windows, open Command Prompt and type `ipconfig`
On Windows, open Settings > Network & Internet > Wi-Fi or Ethernet > Properties
On Windows, open Control Panel > Network and Sharing Center > Change adapter settings > Status > Details
On macOS, open System Settings > Network and select the active connection
On macOS, open Terminal and type `ifconfig`
On Linux, open Terminal and type `ip addr`
On Linux, open Terminal and type `ifconfig`
On a web browser, search for `what is my IP address`
On a router admin page, check the connected devices list
On a computer, use the network connection details to find the IPv4 address
On a computer, use the command `hostname -I` on Linux
On a computer, use the command `ipconfig getifaddr en0` on macOS
On a computer, use the command `nslookup` with the computer name or hostname