IPv6 Test

This page tests your IPv6 connectivity right now: your browser contacts an IPv6-only server, and the result below tells you whether IPv6 works on your connection.

How this test works

Your browser requests api6.ipify.org, a host that is only reachable over IPv6. If the request succeeds, your device, router, and ISP all support IPv6 end to end, and the address shown above is your public IPv6 address. If it fails, some link in that chain does not carry IPv6 yet.

What is dual-stack?

Most connections with working IPv6 are dual-stack: they have both an IPv4 and an IPv6 address at the same time. Your device automatically prefers IPv6 when a website supports it (the "happy eyeballs" algorithm) and silently falls back to IPv4 otherwise — which is why you rarely notice which protocol you are using.

IPv6 not detected — is that a problem?

No. Large parts of the internet still run IPv4-only, and every major website remains reachable over IPv4. It usually means your ISP or router has not enabled IPv6 yet. If you want it, check your router settings for an IPv6 option or ask your ISP. Note that some VPNs intentionally disable IPv6 to prevent address leaks.

Related tools

Check the other protocol with the IPv4 checker, learn the differences in our IPv4 vs IPv6 guide, or see both addresses at once on the main IP checker.