Look Up an AAAA Record (IPv6)
Find the IPv6 address a domain points to, and check whether your site is reachable over IPv6 at all. Useful after enabling IPv6 at your host or CDN, or when mobile users report a slow site.
How to use it
- Type the domain, such as example.com. If you paste a full link, the tool pulls the domain out of it.
- Press Check.
- One or more addresses means the domain is published on IPv6. Nothing means it runs on IPv4 only.
For the same domain's IPv4 address, use DNS Lookup, which shows the A record.
Why use this tool?
- Shows the alias chain If the name is an alias (CNAME) for another service, the whole chain appears before the address, so you can see, for example, that www goes through a CDN first.
- What the world sees Answers come from Cloudflare's and Google's public resolvers, not from your computer's or network's cache, so you know whether a change has really reached the internet.
- How long an old address lingers Each address comes with its TTL: how long networks hold on to the answer. If you've just changed your IPv6 address, that tells you how long until every visitor reaches the new one.
How to read an IPv6 address
An IPv6 address is 128 bits long, four times IPv4, written as eight groups of hexadecimal digits separated by colons. Because that's long, two rules shorten it: leading zeros in each group are dropped, and one run of all-zero groups becomes “::”. So 2001:0db8:0000:0000:0000:0000:0000:0001 is the same address as 2001:db8::1.
The start of an address often tells you who owns it:
| Starts with | What it means |
|---|---|
| 2606:4700 | Cloudflare's network. The site sits behind Cloudflare. |
| 2607:f8b0 or 2a00:1450 | Google's network. |
| 2001:db8 | Reserved for examples and documentation. You won't see it on a real domain. |
| fe80, fd or fc | An internal address that doesn't work on the internet. On a public domain, it's a misconfiguration. |
No AAAA record isn't a fault; your site keeps working over IPv4. But mobile networks in many countries now run on IPv6, and their users reach an IPv4-only site through an extra translation layer that can add delay. Most modern CDNs provide IPv6 automatically, with no setup.
What happens to your query
A browser can't make a DNS query by itself, so the domain you type is sent to our server, which asks public DNS resolvers and passes the answer back to you.
- Only the domain name is sent. No file is involved.
- The answer is cached for two minutes at most, so repeated lookups don't hammer the DNS resolvers.
- Like any website, our server logs technical data with each request, including the domain looked up and your IP address. These logs are kept for no more than 90 days and used only to protect the site and fix faults.
The full details are in our privacy policy.