An IPv6 proxy reaches the internet from an IPv6 address, so it only opens websites that work over IPv6 themselves. If a site has nothing but an IPv4 address, it won't open through such a proxy — and that is the most common reason behind "my proxy doesn't work". The good news: you can check a website in advance, and it takes a minute.
Below: how to tell whether a site supports IPv6, check results for popular services, and the catches that let a home page open while signing in to your account fails.
What "a website supports IPv6" means
When you open a website, your browser or proxy first asks DNS for its address. An IPv4 address is stored in an A record, an IPv6 address in an AAAA record. If the domain has an AAAA record with a public address, an IPv6 proxy can connect to it. No AAAA record — nothing to connect to.
The record is checked for every name separately. example.com and www.example.com can have different addresses, and sign-in pages, images or APIs often live on other domains. That is why a site can be "partially IPv6": some of it opens, some doesn't.
Popular websites: which ones have IPv6
We checked the AAAA records of popular services on 8 October 2026. Things change — websites keep adding IPv6 — so re-check your own sites before you buy.
| IPv6 | Partial | No IPv6 |
|---|---|---|
| Google, YouTube | Amazon — only www.amazon.com | TikTok, X (Twitter), Pinterest |
| Facebook, Instagram, WhatsApp, Threads | Reddit — only reddit.com, not www | eBay, AliExpress, Etsy, Walmart |
| Telegram (website and web app) | Outlook and Hotmail — the site has IPv6, Microsoft account sign-in doesn't | GitHub, Stack Overflow |
| Wikipedia, Netflix, Spotify | Apple — the site has IPv6, Apple ID sign-in doesn't | Discord, Twitch |
| LinkedIn, Zoom, ChatGPT, Bing | OpenAI — only www.openai.com | PayPal, Binance, Bybit |
| Microsoft, Apple, Cloudflare | Booking, Airbnb, Shopify, DuckDuckGo |
Search engines, Meta's social networks, messengers and video services have IPv6, while many marketplaces, payment services and some social networks still don't. IPv6 proxies won't work for those.
How to check a website in a minute
Option 1. Our IPv6 test
Open the IPv6 test and paste the websites — up to 20 at a time. For each one you get one of these answers:
- IPv6 — the site will open through an IPv6 proxy;
- Partial — only some of its names have IPv6, for example the www version, or the site but not its sign-in page. The note tells you which address to open the site by;
- No IPv6 — the domain only has IPv4 addresses and won't open through an IPv6 proxy.
The test checks the domain both with and without www on its own, and for Microsoft and Apple it also checks the addresses their account sign-in goes through.
Option 2. The command line
On Windows, open Command Prompt and run:
nslookup -type=AAAA example.comOn macOS and Linux:
dig AAAA example.com +shortIf the answer contains an address with colons (such as 2606:4700::6810:84e5), that name has IPv6. An empty answer or "No answer" means it doesn't. Repeat the command for the www version and for the subdomains the site uses.
Option 3. Open the site through the proxy
If you already have a proxy, simply open the site through it. A connection error straight away, before any of the page loads, almost always means the site has no IPv6.
Why the home page opens but sign-in doesn't
A website is usually several domains, not one. Through an IPv6 proxy, only the parts with IPv6 will load:
- www and non-www. If only one version has IPv6, open the site by that one. But if that address redirects to the version without IPv6, the page won't open.
- Account sign-in. The Outlook website works over IPv6, for example, but signing in to a personal Microsoft account goes through
login.live.com, which has no IPv6. Apple ID is the same — sign-in goes throughidmsa.apple.com. - Images, scripts and APIs. If files are served from a separate domain without IPv6, the page opens without images or with errors.
To see all of a site's domains, open it in a normal browser, press F12 and look at the Network tab: the address column shows which domains the data comes from. Check the most important ones for IPv6.
What if the website you need has no IPv6?
- See whether the site has another address with IPv6 — the www version or a mobile version, for example.
- For IPv4-only websites, use mobile proxies: mobile carrier IPs open any website.
- If your tasks vary, combine them: IPv6 proxies for IPv6 websites where it pays to hold many addresses, mobile proxies for the rest.
For how IPv4 and IPv6 proxies differ in general, read "IPv4 vs IPv6 Proxies: What's the Difference and Which to Choose".
FAQ
If a website has IPv6, will it definitely open through an IPv6 proxy?
Technically, yes: the proxy will be able to connect to it. But the website still decides for itself whether to let a visitor in — it may have its own limits and checks, just as it does for any other proxy.
Does my internet provider need to support IPv6?
No. You connect to the proxy over an ordinary IPv4 address, and it is the proxy server that reaches the website over IPv6.
How often do websites add IPv6?
All the time, but on no schedule: a major service can switch IPv6 on at any moment, or stay IPv4-only for years. So check your websites before every new task rather than relying on old lists.
If the websites you need passed the check, you can choose the country and number of IPv6 proxies in our configurator.