IPv6 Readiness checks whether a domain and its key services (web, mail) are reachable over IPv6, giving you a dual-stack coverage report for the move to the modern internet protocol.
Enter a domain name (example.org) and run the tool. The probe checks for AAAA records and tests IPv6 connectivity to the web and mail services.
Input: Domain — e.g. example.org.
The output reports whether the apex and www hosts have AAAA records, whether the web service answered over IPv6, and whether mail exchangers have IPv6 addresses. A fully dual-stack domain is ready for the ongoing IPv6 transition; gaps highlight where IPv6 deployment is still needed.
→ Audit a domain’s dual-stack coverage before an IPv6 launch.
→ Find which services still lack AAAA records.
→ Verify web and mail reachability over IPv6 after deployment.
→ Prepare for IPv6-preferred networks and NAT64 environments.
Major networks increasingly operate IPv6-only or IPv6-preferred stacks, and some mobile carriers use NAT64. Without AAAA records, those users must fall back through translation, which can add latency or break connectivity for IPv6-preferred clients.
The AAAA record exists but the service behind it is not listening on IPv6, or a firewall blocks IPv6 inbound. Confirm the web server binds to the IPv6 address and that the security group/firewall allows IPv6 traffic on 80/443.
Yes — publish AAAA records for your MX hosts and ensure they accept inbound SMTP over IPv6. Avoid sending mail over IPv6 until you have published SPF/DKIM/DMARC and PTR records for those addresses, or deliverability may suffer.