About aaaa record lookup
An AAAA record maps a domain name to an IPv6 address. IPv6 has far more addresses than IPv4 and is used by many mobile networks.
Why it matters
- Users on IPv6-only networks need an AAAA record to reach you.
- If an AAAA record exists but the server does not listen on IPv6, visitors may see slow or failed connections.
A worked example
A result such as 2001:db8::10 means the site is reachable over IPv6. If the lookup returns nothing, the domain has no IPv6 address, which is fine for most sites. Add an AAAA record only if your server really listens on IPv6.
Testing
- Use ping -6 or curl -6 to test an IPv6 address.
- Make sure the firewall allows IPv6 as well as IPv4.
- A broken AAAA record can make a site slow for visitors on IPv6 networks.
