Is your connection ready for IPv6?
This test checks from your browser whether you reach websites over IPv4, over IPv6 and over both, whether large packets get through, and which protocol your browser prefers. It takes a few seconds.
Your results
- Your IPv4 address
- …
- Your IPv6 address
- …
| Test | Result |
|---|---|
| IPv4 a name with only an IPv4 address (A record) | waiting |
| IPv6 a name with only an IPv6 address (AAAA record) | waiting |
| Dual stack a name with both addresses, like most large websites | waiting |
| Dual stack, large packets the same name with a request and an answer larger than one packet | waiting |
| IPv6, large packets the IPv6-only name with a request and an answer larger than one packet | waiting |
Questions and answers
What is IPv6?
IPv6 is the newer version of the Internet Protocol. IPv4 addresses ran out years ago, so providers hand out IPv6 addresses alongside or instead of IPv4. A connection that has both works with every website.
How does the test work?
Your browser fetches a tiny file from three names of ipv4ipv6test.com: one that exists only over IPv4, one only over IPv6, and one over both. Each answer says from which address it was asked. Two more requests are larger than one network packet, to find links that drop big packets.
What do the scores mean?
The IPv4 score is 10 when IPv4 works. The IPv6 score starts at 6 when IPv6 works, adds 2 when large IPv6 packets get through and 2 when your browser uses IPv6 for sites that have both (1 when it picks IPv4). A slow answer costs a point.
I have no IPv6. Is that a problem?
Not today: every website still works over IPv4. IPv6 is often faster on mobile networks and needs no address sharing. Ask your provider whether they offer it, and check that it is switched on in your router.
What is broken IPv6?
Your device has an IPv6 address, but IPv6 traffic does not reach the internet. Browsers then try IPv6 first, wait, and fall back to IPv4, so sites load slowly or not at all. It is worse than having no IPv6, and the test shows it as failing or slow dual stack.
Do you store my IP address?
No. The test server answers each request with the address it came from and keeps nothing. The page sets no cookies and loads nothing from other sites; the text with your results stays in your browser unless you copy it.