IPv6 Reachability
Checks whether a host has AAAA records and whether our server can actually reach it over IPv6. Useful for verifying IPv6 readiness of websites and services.
Frequently asked questions
- Why does IPv6 support matter?
- Many mobile carriers and ISPs are IPv6-only. A site without AAAA records becomes unreachable for those users or slower via NAT64 gateways.
- How do I add IPv6 to my site?
- Your hosting provider must assign an IPv6 address (most do; some charge extra). Add an AAAA record pointing to it. Cloudflare enables IPv6 automatically on proxied domains.
- My AAAA exists but the check fails — why?
- Many home routers block incoming IPv6 even with a public address. Our server pings from a dual-stack datacenter, so if we cannot reach you, most external IPv6 traffic also cannot.