IPv6 check – Does your connection support IPv6? | IPv6 Speedtest

IPv6 Check

Check live whether your connection supports IPv6.

Does your connection support IPv6?

Our speed test automatically detects whether your connection runs over IPv4 or IPv6. But do you want to perform a more in-depth check? On this page we explain how it works and what you can do if IPv6 is not yet enabled.

How to check for IPv6 support

Method 1: via our speed test

Go to the homepage and start the speed test. The result will indicate which protocol (IPv4 or IPv6) was used to establish the connection.

Method 2: via your browser

Visit test-ipv6.com or ipv6-test.com. These sites show your IPv4 and IPv6 address (if available) and give a score from 0 to 10 for IPv6 reachability.

Method 3: via Command Prompt (Windows)

Open a Command Prompt (Win + R → cmd) and type:

ipconfig /all

Look for lines starting with IPv6 Address. An address starting with 2001: or 2a00: is a public IPv6 address – you have IPv6!

Method 4: via Terminal (macOS / Linux)

Open Terminal and type:

ip -6 addr show (Linux) or ifconfig | grep inet6 (macOS)

An address that does not start with fe80: (link-local) is a public IPv6 address.

What is dual-stack?

Dual-stack means that a device or network simultaneously supports both IPv4 and IPv6. This is the most common approach during the transition period from IPv4 to IPv6.

With a dual-stack connection:

  • Each device has both an IPv4 and an IPv6 address;
  • IPv6 is preferred when both protocols are available (Happy Eyeballs algorithm);
  • The connection seamlessly falls back to IPv4 if IPv6 is unavailable;
  • The transition is completely transparent to the user.

Enabling IPv6 on your router

If your internet provider offers IPv6 but your connection is not using it, check the settings of your router:

  1. Open your router admin page (usually 192.168.1.1 or 192.168.0.1).
  2. Look for IPv6, WAN settings or Internet connection.
  3. Enable IPv6 (choose DHCPv6 or SLAAC – depending on your provider).
  4. Save and restart the router.

Consult your router manual or your provider's customer service if you are unsure which setting to choose.

My connection has no IPv6 – what now?

If your provider does not yet offer IPv6, you have a few options:

  • Ask your provider to enable IPv6 – more and more providers do this on request.
  • Tunnel protocols: services like Hurricane Electric Tunnel Broker offer free IPv6 tunnels over IPv4.
  • Switch provider: consider a provider that delivers IPv6 as standard.

Keep in mind: for most everyday tasks, IPv4 is still perfectly fine. IPv6 only becomes noticeably advantageous as more services natively support it.