    Home
    /
    Tools
    /
    IPv6 Leak Test
  

    
    Live Tool
  

IPv6 Leak Test

Check whether your real IPv6 address is leaking and exposing your true identity — even when your VPN only covers IPv4 traffic. Many VPNs fail to handle dual-stack connections correctly, leaving your IPv6 address fully exposed.

Instant results  ·  Nothing stored  ·  No account needed

Test Result

Run the test to check
your IPv6 status

IPv4 Address

—

IPv6 Address

—

IPv6 Support

—

Leak Status

—

Network Details

ISP

—

ASN

—

Country

—

City

—

Dual Stack

—

What Is an IPv6 Leak?

An IPv6 leak occurs when your device has both an IPv4 and IPv6 address (dual-stack) but your VPN only encrypts and tunnels IPv4 traffic. When you visit a website that supports IPv6, your browser connects directly using your real IPv6 address — completely bypassing the VPN tunnel.

This exposes your true identity to the website even though your IPv4 address is hidden. Because IPv6 addresses are often tied directly to your ISP account and geographic location, an IPv6 leak can be more personally revealing than an IPv4 leak.

Most home internet connections now support dual-stack IPv4/IPv6. Many VPN providers still do not fully support IPv6 tunneling, making IPv6 leaks one of the most common and overlooked privacy vulnerabilities for VPN users.

How to Fix an IPv6 Leak

1

Enable IPv6 Leak Protection

Check your VPN client settings for an IPv6 leak protection or IPv6 kill switch option. Enable it and reconnect. This blocks all IPv6 traffic when the VPN is active.

2

Disable IPv6 on Your System

On Windows go to Network Adapter Settings and uncheck Internet Protocol Version 6. On macOS use Network Preferences to disable IPv6 per interface. This prevents any IPv6 traffic from being sent.

3

Switch to a VPN with Full IPv6 Support

Use a VPN provider that tunnels both IPv4 and IPv6 traffic through the encrypted connection. This is the most complete fix and allows you to keep IPv6 enabled on your device.

Frequently Asked Questions

What is the difference between IPv4 and IPv6?

IPv4 uses 32-bit addresses like 192.168.1.1 and supports around 4.3 billion unique addresses. IPv6 uses 128-bit addresses like 2001:db8::1 and supports a virtually unlimited number. IPv6 was created to replace IPv4 as the internet ran out of available IPv4 addresses.

Does my ISP assign me an IPv6 address?

Most modern ISPs now assign both an IPv4 and an IPv6 address by default. If your device shows an IPv6 address in this test, your ISP supports IPv6. The prevalence of dual-stack connections is why IPv6 leaks are such a common VPN vulnerability.

Is disabling IPv6 safe?

For most home users, temporarily disabling IPv6 is safe and will not affect normal internet usage. Most websites and services still support IPv4. However, some newer services and applications are beginning to prefer IPv6, so disabling it permanently may cause issues in the future.

How common are IPv6 leaks?

Very common. Studies have found that a significant proportion of commercial VPN services do not properly handle IPv6 traffic, either tunneling it incorrectly or leaving it completely unprotected. Users on dual-stack connections are particularly vulnerable.

My test shows no IPv6 address — am I safe?

If no IPv6 address is detected it means either your ISP does not assign IPv6 addresses, IPv6 is disabled on your device, or your VPN is correctly blocking IPv6 traffic. All three scenarios mean no IPv6 leak is occurring.

Does this test store my IP address?

No. The IPv6 detection runs through external API calls that return your IP data. No results are logged on our servers. The data is only used locally in your browser to display your results and is discarded when you close or refresh the page.