Free network tool

IPv6 connectivity test

Check whether your connection can reach the internet over IPv4, IPv6 or both.

Your result

Checking IPv4 and IPv6…

Testing a separate endpoint for each address family.

Checking
IPv4Checking…
IPv6Checking…
ConnectionChecking…

A successful request confirms that address family for this path. A failed request means it was not confirmed in this run.

How it works

Understand your connectivity

IPv6 is a newer IP addressing protocol with a much larger address space than IPv4. A dual-stack connection supports both, but a normal website visit only shows the path your browser selected for that request.

This test uses separate IPv4-only and IPv6-only hostnames so each path is checked independently. If IPv6 is not confirmed, review the ISP-facing router and VPN settings, then repeat the test on another network to narrow down the cause.

Both confirmed

Your connection reached both dedicated endpoints. This is evidence of working dual-stack connectivity on the tested paths.

IPv6 confirmed

Your browser reached the IPv6-only endpoint over IPv6, with no IPv4 fallback on that hostname.

IPv6 not confirmed

Your ISP, VPN, firewall or DNS settings may be involved. A temporary failed request does not prove IPv6 is permanently unavailable.

What to try next

Check your router and VPN IPv6 settings, then check again. Test after a network change to compare the result.

View endpoint observations

Run the test to see its detected details.

Common questions

Can the regular website use IPv4 when IPv6 works?

Yes. On a dual-stack hostname, the browser chooses a working path. That choice does not describe every available path.

Can a VPN affect IPv6?

Yes. A VPN may support, block or route IPv6 separately from IPv4.

Does a failed test mean my ISP has no IPv6?

No. DNS, routing, browser policy or a temporary endpoint issue can also prevent the request.

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