Access the router settings: Open a web browser and enter the router's IP address in the address bar. If you're not sure what it is, check your router's manual or search online for the default IP address for. In the networking world, a default gateway is an IP address that traffic gets sent to when it's bound for a destination outside the current network. Look for the "Default Gateway" entry; the IP address next to it is your modem or router's IP address. " Click on your active network connection, then click. Very briefly, you can find your router's IP address in your Command Prompt (Windows), in your Network settings on Macs, iPhones, and iPads, and in Advanced Network and Internet settings on Android devices. For more detailed instructions, read on.