WebRTC — the browser technology behind calls and video chat — sometimes reveals your real IP address behind your VPN. Let's check whether that's happening to you.
Click "Run Test" — it takes a couple of seconds.
If you're not connected to a VPN, seeing your normal public IP here is expected — that's normal.
If you are connected to a VPN and see an IP address here that's different from your VPN server's IP, that's a WebRTC leak: websites can learn your real address around the tunnel.
Modern versions of Chrome and Edge hide local IPs behind mDNS by default (you'll see something like xxxxxxxx-xxxx….local instead of a real address) — that's normal and not a leak. Firefox and Safari behave a bit differently, so it's worth testing in whichever browser you actually use with your VPN.
404 VPN encrypts your traffic and hides your real IP from the sites you visit. If WebRTC still exposes your address, that's a browser or client setting — not a sign that the VPN itself isn't working.
How to connect 404 VPN →