IPv6 compatibility checker
Find out whether a website can be reached over IPv6. The check asks two public DNS resolvers for the domain’s IPv6 (AAAA) records, its www name and its name servers, straight from your browser.
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Each takes seconds. The IP, IPv6 and WebRTC checks run on your own device with no account.
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Open the toolIP Lookup
Country, region, city, ISP and ASN of any IPv4 or IPv6 address, or of your own.
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Does your browser reveal your real IP through WebRTC behind a proxy or VPN?
Open the toolHow the IPv6 Checker works
Enter a domain
Type a domain such as example.com. A full link works too: only the name is kept.
Your browser asks DNS
It queries Cloudflare (1.1.1.1) and Google (8.8.8.8) over DNS over HTTPS for IPv6 records.
See the addresses
Every IPv6 address found for the domain, www and the name servers that answer for it.
What IPv6 support means for a website
A website supports IPv6 when its name has an AAAA record, the IPv6 counterpart of the A record that holds an IPv4 address. Without one, visitors on IPv6-only networks reach the site only through translation, and IPv6 proxies cannot connect to it directly.
The checker looks at three names: the domain itself, its www name (many sites serve one and not the other) and the name servers listed for the domain, which shows whether the DNS itself can be reached over IPv6.
How the check works
Your browser sends the questions to Cloudflare’s and Google’s public resolvers with DNS over HTTPS and reads their answers itself. Our server is not involved, so the domains you check are seen only by those resolvers, as with any DNS lookup.
A domain that resolves with no AAAA record has no IPv6 address. A domain that does not exist, or a resolver that cannot be reached, is reported as such.
Why it matters for proxies
Residential proxies usually exit over IPv4, which every website accepts. Knowing whether a target also answers over IPv6 helps when you compare the addresses a site logs, or when a network you work from prefers IPv6.
Setting up a proxy? The documentation has ready-to-run examples for Python, Playwright and Selenium.
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Frequently asked questions
How do I know if a website supports IPv6?
Enter its domain here. If the domain or its www name has at least one AAAA record, the site can be reached over IPv6.
Does this test my own connection’s IPv6?
No. It checks a website’s DNS records. To see the address your own connection uses, try the IP Lookup tool and press “My IP”.
Which DNS servers are used?
Cloudflare’s 1.1.1.1 and Google’s 8.8.8.8, through DNS over HTTPS, asked directly by your browser.
Is the check free and unlimited?
Yes. It runs in your browser and needs no account.
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