IPv6 Website Checker
Uses public Google DoH (dns.google) to resolve A and AAAA records.
Find out if your target is IPv6-ready
Modern endpoints, IoT APIs and CDN edges are increasingly v6-only. We check resolution and reachability so you don't burn proxy budget guessing.
DNS lookup
We resolve A and AAAA records via Google's public DoH so you see the same answers a fresh client would.
Dual-stack check
We compare both record sets to flag IPv4-only, IPv6-only and properly dual-stacked domains.
Latency estimate
We approximate IPv6 reachability latency so you know whether routing your scraper over v6 will hurt throughput.
Cheaper at scale
IPv6 pools cost a fraction of IPv4. If your targets accept v6, you can move to unlimited bandwidth pricing.
Dual-stack aware
Tells you whether to pin v6, pin v4 or let the resolver choose. Important for sticky session jobs.
Fresh data, no cache
Every check hits Google's public resolver, no stale answers from your local DNS or VPN.
How to check if a website supports IPv6
This free Rainproxy tool checks whether a domain is reachable over IPv6. Enter a hostname and it resolves both A and AAAA records, confirms dual-stack reachability and estimates IPv6 latency, so you know before you point IPv6-only clients or IPv6 proxies at it.
What an AAAA record means
An A record maps a hostname to an IPv4 address; an AAAA record maps it to an IPv6 address. If a domain has no AAAA record, IPv6-only clients cannot reach it directly, no matter how their network is configured. Finding an AAAA record is the first requirement for IPv6 support, but the address also has to answer, which is why this tool probes it rather than trusting DNS alone.
Dual stack explained
Dual stack means the host publishes both A and AAAA records and serves traffic on both. This is the normal configuration for a modern site: IPv6 clients use IPv6, everyone else keeps using IPv4, and nothing breaks. A domain that answers on IPv4 but times out on its published AAAA address is misconfigured and will look intermittently broken to IPv6 users.
Why this matters for proxies
IPv6 proxies are far cheaper than IPv4 because addresses are abundant, and they work beautifully against targets that support IPv6, including Google and YouTube. Against an IPv4-only target they need a fallback. Checking the target first tells you which pool to buy, and Rainproxy IPv6 plans include IPv4 fallback for exactly the cases this tool flags.