IPV6 TEST

IPv6 Test

Test whether your network supports IPv6: separate IPv4 / IPv6 egress probes, latency and browser preference.

Probing IPv4 and IPv6 egress…

IPv4 egress ProbingLatency —

IPv6 egress ProbingLatency —

Preferred by your browser for this site—

Locating…

IPv4Probing…

IPv6Probing…

Detecting your public IP…

This page ignores your system settings and only checks whether your browser can actually reach the internet over IPv6. It does so by connecting to two probe hostnames that each publish a single address family — whichever connects proves that family really works.

How the test works

The v4 probe hostname has only an A record, forcing IPv4; the v6 probe hostname has only an AAAA record, forcing IPv6. Both requests run in parallel and record success, the egress address and latency. A normal request to the main site then reveals which family your browser actually chose when both were available.

"Supports IPv6" here means end-to-end usable: the ISP assigned an address, the router passes it, the OS enabled it and the browser really uses it. Any missing link shows as unreachable.

Common reasons IPv6 fails

In order of frequency: the ISP has not provisioned IPv6 on the line (ask support); the modem or router has IPv6 disabled on WAN or prefix delegation off on LAN; IPv6 is disabled on the OS or adapter; the VPN / proxy client handles IPv4 only and blocks IPv6; corporate networks disable IPv6 by policy.

How to enable IPv6

Set the router's WAN IPv6 to automatic (usually "auto" or "native" on PPPoE), enable RA / DHCPv6 on the LAN side, confirm the OS network settings have IPv6 on automatic, then re-run the test. If it still fails, the ISP most likely has not provisioned it and you need to call them.

The dual-stack risk: IPv6 leaks

Many VPNs and proxies only handle IPv4; IPv6 requests then leave through your real network and sites obtain your real address. If this page shows dual-stack while you are on a VPN / proxy, verify the IPv6 item on the leak test page or enable "block IPv6" in the client.

Common questions

IPv6 is supported, so why do many sites still use IPv4?

A site only gets IPv6 traffic if it publishes AAAA records. A large share of sites are still IPv4-only, so the browser has no choice — that is unrelated to your network.

Why does my IPv6 address keep changing?

That is the OS privacy extension (RFC 4941): outbound temporary addresses rotate regularly, typically daily, while the prefix stays. The whole address changes when the ISP reassigns the prefix.

IPv6 shows unreachable after connecting a VPN — is that normal?

Normal, and often desirable: the client is blocking IPv6 so no IPv6 leak can happen. Only pick a v6-tunneling service if you genuinely need IPv6 resources through the VPN.

Is an IPv6-only mobile network a problem?

Usually not. Carriers translate IPv4 traffic through NAT64 / DNS64 or 464XLAT transparently; only a few old apps hard-coding IPv4 addresses misbehave.