IP Tools
IPv6 Test: Check Your IPv6 Connectivity and Configuration
IPv6 is the modern internet addressing protocol that replaces the exhausted IPv4 space. Many websites now prefer IPv6 connections, and some ISPs route IPv6 traffic differently than IPv4. Our test checks whether your connection supports IPv6 and compares performance between both protocols.
Launch in Mission ControlWhat It Measures
This test checks whether your network has a valid IPv6 address, tests connectivity to IPv6-only and dual-stack destinations, measures latency and speed over IPv6 versus IPv4, and reports your ISP's IPv6 deployment status.
How It Works
- Detects your IPv4 and IPv6 addresses (if available)
- Tests connectivity to IPv6-only test servers
- Measures latency to identical servers over both protocols
- Checks dual-stack preference behavior on your connection
Why It Matters
As IPv4 addresses run out, more services move to IPv6. ISPs that have not deployed IPv6 force users through carrier-grade NAT (CGNAT), which causes problems with gaming, peer-to-peer applications, and certain VoIP services. Knowing your IPv6 status helps diagnose these connection issues.
Understanding Your Results
Full IPv6 support means your connection has a native IPv6 address (not a tunneled 6in4 address), can reach IPv6-only destinations, and achieves similar latency over both protocols. ISPs that rank highly for IPv6 deployment include fiber and modern cable providers.
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Run IPv6 Test Now →Frequently Asked Questions
Does my ISP support IPv6?
IPv6 deployment varies widely by ISP and region. Major ISPs in the US, Europe, and Asia typically support IPv6 on residential connections, but not all plans are enabled by default. Running this test is the easiest way to confirm whether your specific connection has IPv6 working.
Is IPv6 faster than IPv4?
In most cases, IPv6 and IPv4 have similar performance. IPv6 can be slightly faster when it avoids carrier-grade NAT (CGNAT) translation that IPv4 sometimes requires. The main IPv6 advantage is direct end-to-end connectivity without NAT, which benefits real-time applications.
What is dual-stack connectivity?
Dual-stack means your connection supports both IPv4 and IPv6 simultaneously. Your device has both an IPv4 and IPv6 address and can use either protocol. Modern operating systems prefer IPv6 via the Happy Eyeballs algorithm, falling back to IPv4 if IPv6 fails.
What is CGNAT and why does it matter?
Carrier-Grade NAT (CGNAT) is when your ISP shares a single public IPv4 address among hundreds of customers. CGNAT breaks certain applications, limits incoming connections, and can cause issues with gaming, torrents, and VoIP. IPv6 eliminates the need for CGNAT by giving each device a globally unique address.
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