An AAAA record maps a hostname to an IPv6 address. It enables dual stack sites to serve users on IPv6 and can improve reachability in networks where IPv4 is limited. Many browsers use Happy Eyeballs, which means they try IPv6 and IPv4 in parallel and pick the fastest. If your IPv6 path is broken, users can still experience delays, so verifying AAAA records and actual connectivity is important.
Common AAAA issues include publishing an IPv6 address that does not route, forgetting to open IPv6 firewall rules, or pointing to a server that only listens on IPv4. Another pitfall is mixing AAAA for the apex while www stays IPv4 only. This lookup shows AAAA results across resolvers so you can validate what the public DNS actually returns and spot inconsistent propagation.
If you need related checks, try Check A record online and Check DNS propagation check online.
Only if the service is reachable over IPv6. Publishing AAAA without working IPv6 can lead to slow or failed connections. Start with critical hostnames, confirm connectivity, then expand.
This is a propagation or caching issue. Resolvers may cache older records based on TTL. Check authoritative records and wait for caches to expire.
No. AAAA complements A. Many sites run both so clients can choose. Removing A records will break IPv4-only networks.
Happy Eyeballs is a client strategy that tries IPv6 and IPv4 nearly simultaneously. If IPv6 is misconfigured, it can still cause connection delays. A clean AAAA setup helps avoid these issues.
IPv6 addressing and routing can differ between providers and regions. Verify the exact address assigned to your host and make sure the AAAA record matches the live interface.
Yes. Use a low TTL during migrations to speed up changes. After stability, increase TTL for cache efficiency.