IPv6 Test: Do I Have IPv6?

This IPv6 test tells you in a few seconds whether your connection works over IPv6: it connects to one of our servers over IPv4 only, over IPv6 only, and over both, then shows which protocol your browser prefers, whether IPv6 is broken, and whether IPv6 traffic bypasses your VPN.

Four things, each from a real connection your browser makes, not from a guess.

Then it decodes your IPv6 address: the /64 prefix your provider gave your home network, the interface ID your device picked, whether it's native IPv6 or a tunnel such as Teredo, and whether the address contains your device's MAC address.

IPv6 needs three links to work: your internet provider, your router and your device. Check them in this order.

1. Provider. Search "your provider IPv6" or ask support. Most large providers offer it, sometimes only on newer plans or routers. Mobile networks usually have it already.
2. Router. Open its admin page (find its address) and look for an IPv6 section. Turn IPv6 on and choose the automatic or "native" connection type your provider uses; prefix delegation (DHCPv6-PD) is usually what makes IPv6 reach your devices. Save and restart.
3. Device. It's on by default on current systems. Check it if you changed network settings:
   • Windows: Control Panel › Network and Sharing Center › Change adapter settings › your adapter › Properties: tick Internet Protocol Version 6 (TCP/IPv6).
   • Mac: System Settings › Network › your connection › Details › TCP/IP: Configure IPv6 set to Automatically.
   • Android (mobile data): Settings › Mobile network › Access Point Names › your APN: APN protocol set to IPv4/IPv6 (names vary by brand).
   • Linux: ip -6 addr show scope global should list an address; in NetworkManager, set IPv6 to Automatic.
4. Run this test again. A green IPv6 tile means every link works.

Broken IPv6 (the IPv6 tile says "No answer") usually comes from the router: restart it, update its firmware, then retest. If it persists, tell your provider the test result (use Copy results). Until it's fixed, turning IPv6 off on your device stops the delays.

A VPN that only tunnels IPv4 lets IPv6 traffic go out directly, so sites reached over IPv6 see your real connection. This test catches it by comparing the networks of your two addresses.

Connect your VPN and run the test. With a VPN that covers both protocols, the IPv4 and IPv6 tiles show the same network, the VPN's, or IPv6 is unavailable because the VPN blocks it, which is also safe. If the notice says IPv4 and IPv6 leave through different networks, turn on the VPN's IPv6 or leak protection option, or switch IPv6 off while connected. Then check WebRTC too with the WebRTC leak test.

It can. Older setups build the second half of the IPv6 address from the device's MAC address (EUI-64, with ff:fe in the middle), so every site can recognise the device on any network. The test flags it.

Windows, macOS, iOS and Android use random temporary addresses (privacy extensions, RFC 8981) for outgoing connections instead. If the test shows an address built from your MAC, turn privacy extensions on: on Linux, set net.ipv6.conf.all.use_tempaddr = 2; on a router or embedded device, check its IPv6 settings. The first half, the /64 prefix, identifies your home network, much like an IPv4 address.

IPv4 has about 4.3 billion addresses, and they ran out. IPv6 has 2¹²⁸, enough to give every device its own public address.

Because IPv4 addresses are scarce, providers now put many customers behind one shared address (carrier-grade NAT), which can break online gaming, peer-to-peer apps and hosting from home. IPv6 avoids that. On 28 March 2026, more than half of users reached Google over IPv6 for the first time (50.1%). Read more in What Is IPv6?