🌐 IPv6 Test
Check whether your connection supports IPv6, see your IPv6 and IPv4 addresses and detect dual-stack mismatches.
Click the button to test IPv4 and IPv6 connectivity at the same time.
💡 Why IPv6 matters for privacy
Many VPNs tunnel only IPv4. If your network also has IPv6 and the destination supports it, the browser can take a direct IPv6 route that bypasses the VPN and exposes your real address. The tell is simple: if IPv4 and IPv6 belong to different networks or providers, traffic is splitting across both stacks.
🔐 The test runs in your browser and only contacts public IP services (ipify.org). Nothing is sent to 0Appz.
How to use this tool
Overview
IPv6 Test - Check IPv6 Connectivity & Dual-Stack Status checks IPv6 connectivity in your browser. Click once and the tool tests IPv6 and IPv4 at the same time, showing your addresses and classifying your connection as dual-stack, IPv4-only or IPv6-only. This matters for privacy: many VPNs tunnel only IPv4, so an active IPv6 stack can bypass the tunnel and expose your real address. If IPv4 and IPv6 belong to different networks, traffic is splitting across both stacks. The test only contacts public IP services (ipify.org) — nothing is uploaded to 0Appz.Frequently asked questions
What is an IPv6 test? +
An IPv6 Test - Check IPv6 Connectivity & Dual-Stack Status checks whether your connection can reach the internet over IPv6 and shows your IPv6 and IPv4 addresses so you can see whether your network is dual-stack.
Why does my IPv6 show as not detected? +
Your ISP or router may not have IPv6 enabled, or your device may have it turned off. You can keep using IPv4 normally — without IPv6 there is nothing to leak.
What is a dual-stack network? +
Dual-stack means your connection runs IPv4 and IPv6 at the same time. Most modern networks are dual-stack.
Can IPv6 leak my real IP behind a VPN? +
Yes. Many VPNs tunnel only IPv4. If your network also has IPv6, traffic can take a direct IPv6 route outside the VPN and expose your real address. Compare the IPv6 you see here with your VPN provider network.
Is this tool free and private? +
Yes — it is 100% free with no sign-up. The test only contacts public IP services (ipify.org); 0Appz stores nothing.