Check the label on your router
Look for the default gateway in your device network settings
On Windows, open Command Prompt and run `ipconfig`
On Mac, open System Settings and view your network details
On iPhone or iPad, open Wi-Fi settings and tap your connected network
On Android, open Wi-Fi settings and view the network details
Use `ip route` or `route -n` on Linux
Open your browser and try common router addresses like `192.168.0.1` or `192.168.1.1`
Check your modem or ISP documentation
Use your router app if your router has one