A local IP address identifies your device inside the network you are currently connected to. It is normally drawn from a private range such as 192.168.x.x, 10.x.x.x, or 172.16.x.x through 172.31.x.x. Your router uses these addresses to deliver traffic to the correct device without exposing every device directly to the public internet.

Why browser detection sometimes fails?

This tool attempts a browser-side WebRTC check. Modern browsers deliberately hide or replace local address details in many situations to reduce fingerprinting. A result of “not available” is therefore normal and does not mean your network is broken.

The reliable way to find it

On Windows, open your network connection details or run ipconfig and look for the active adapter’s IPv4 address. On macOS, check System Settings → Network → your active connection. On Android and iOS, open the details for the Wi-Fi network you are using. Those operating-system screens are a better source than any webpage because the browser does not need to expose private-network information to them.

Local IP vs. default gateway

Your device might be 192.168.1.42 while the router is 192.168.1.1. The router’s address is normally shown as Default Gateway, Router, or Gateway. If your goal is to open the administration panel, use that gateway value rather than your device’s own local address.

Privacy

The browser probe runs locally. If your browser refuses to reveal the address, this page does not try to bypass that privacy decision.

Why the browser can hide local addresses?

Modern browser privacy controls deliberately limit local-network discovery. When a browser cannot reveal a private address, use the operating system network panel or command line instead. On a troubleshooting case, record the local address together with the subnet/prefix and default gateway; the three values explain much more than the client address alone.

Spot the wrong subnet quickly

If a laptop has an old static address after a router replacement, it can look connected while being unable to reach the new gateway. Compare the client network with the gateway network before changing DNS or resetting the router.