IPv6 Connectivity Test

Test IPv4, IPv6, dual-stack, MTU and DNS directly from your browser.

Testing your connection...

IPv6 score

/ 10

IPv4 score

/ 10

Public IP addresses

IPv4 address

Not available

IPv6 address

Not available

Connectivity checks

Tests contact public third-party endpoints directly. Exact IP addresses are shown only in your browser and are not stored by this site. Only an anonymous city-level score is submitted for aggregate statistics.

Domain IPv6 checker

Check whether a domain publishes IPv6 (AAAA) and IPv4 (A) DNS records.

Worldwide IPv6 readiness

APNIC Labs 30-day IPv6 capability, combined with anonymous community test scores.

Country capability data: APNIC Labs

Understanding your IPv6 test

IPv6 is the current Internet Protocol designed to replace the exhausted IPv4 address space. A good result requires more than merely having an IPv6 address.

What the score measures

The score combines IPv6-only reachability, dual-stack behavior, browser protocol preference, large-packet delivery and IPv6 hostname reachability. An IPv6 address alone does not guarantee that routes, DNS and MTU are working.

Why dual stack matters

Most of the web currently publishes both A and AAAA records. Browsers use Happy Eyeballs to race suitable routes and avoid long delays when one protocol is broken. A healthy network can use both without noticeable stalls.

MTU and PMTUD problems

IPv6 routers do not fragment packets in transit. Path MTU Discovery must work so endpoints choose a safe packet size. Misconfigured firewalls that block required ICMPv6 messages can make small requests work while larger pages stall.

How to improve a low result

Check that IPv6 is enabled on your router, install current firmware, use automatic or ISP-provided IPv6 settings, and test another network. If IPv6 is assigned but repeatedly times out, report the result to your ISP.

Frequently asked questions

How do I test whether IPv6 is working?

Run this page and confirm that IPv6-only connectivity, dual-stack connectivity and the MTU test pass. Your public IPv6 address should also appear.

Why do I have an IPv6 address but some tests fail?

Routing, DNS, firewall rules or Path MTU Discovery may still be broken even when an address has been assigned.

Is an IPv4-only connection broken?

Most websites still support IPv4, but IPv6-only services will be unreachable and future compatibility depends on your ISP providing IPv6.

Does this test store my IP address?

No. Exact addresses are displayed locally in your browser. The site stores only anonymous city-level aggregate scores.