The free IPv6 compatibility checker tests whether any website supports IPv6 — an AAAA DNS lookup plus a live connection test through a real IPv6 proxy network, so you know if IPv6 proxies will work before you buy.
We resolve the domain's AAAA records and then actually connect over IPv6 through our proxy network, confirming real end-to-end reachability rather than just DNS presence.
IPv6 proxies are far cheaper and harder to exhaust, but only work on IPv6-ready targets. This tool tells you instantly whether a site qualifies.
An IPv6 compatibility checker tests whether a website can be reached over the IPv6 protocol. It looks up the domain's AAAA DNS records and performs a live connection test through a real IPv6 network, so you know if the site will work with IPv6 proxies before you buy them.
Many websites still run on IPv4-only infrastructure. If a site does not publish AAAA DNS records or its servers don't accept IPv6 connections, it cannot be reached through an IPv6 proxy. Large platforms like Google, YouTube, Facebook and Instagram support IPv6, but smaller or older sites often do not.
The checker runs two tests: first it queries the domain's DNS for AAAA (IPv6) records, then it loads the website through the Quantum Proxies IPv6 network to confirm it actually responds over IPv6. Both tests together give a reliable compatibility verdict.
If a site fails the IPv6 test, use IPv4-based proxies instead: residential proxies for maximum legitimacy, ISP proxies for speed with residential trust, or datacenter proxies for high-volume workloads. Quantum Proxies offers all of them.
IPv6 proxies are dramatically cheaper than IPv4 proxies and come in virtually unlimited quantities, making them perfect for high-volume automation on IPv6-enabled targets. As long as your target supports IPv6, they offer the best cost per request on the market.
Yes, the checker is completely free and requires no account. There is a soft rate limit to keep the service fast for everyone.
Skip the marketing. QuantumProxies.io publishes a machine-readable site map, Markdown for every page, a free MCP server, and APIs billed from the same balance as your proxies.
Connect in one command: npx -y quantumproxies-mcp