AAAA Record Lookup
Look up AAAA records (IPv6 addresses) for any domain. Retrieve IPv6 address mappings and verify IPv6 connectivity.
Frequently Asked Questions
What is an AAAA record?
An AAAA record maps a domain name to an IPv6 address — the 128-bit successor to the 32-bit IPv4 address space used in A records. The name comes from the fact that IPv6 addresses are four times the size of IPv4 addresses. When a client supports IPv6, it performs an AAAA lookup; if the domain has an AAAA record and the network supports IPv6, the connection uses IPv6 instead of IPv4.
Do I need an AAAA record if I already have an A record?
Not strictly required, but strongly recommended. IPv6 adoption is growing, and many ISPs, mobile networks, and cloud providers are IPv6-native. Publishing an AAAA record alongside your A record (dual-stack) ensures your site is reachable over both protocols. Modern operating systems prefer IPv6 when available (Happy Eyeballs algorithm). Without AAAA records, IPv6-only clients cannot reach your site.
What does an IPv6 address look like?
IPv6 addresses are 128-bit values written as eight groups of four hexadecimal digits separated by colons, for example 2001:0db8:85a3:0000:0000:8a2e:0370:7334. Consecutive groups of all zeros can be collapsed to :: (once per address), making it shorter: 2001:db8:85a3::8a2e:370:7334. Leading zeros within groups are also optional. The loopback address is ::1 (equivalent to IPv4's 127.0.0.1).
Why would my AAAA record lookup return no results?
If no AAAA record exists for the domain, the lookup returns NOERROR with no answer (NXDOMAIN only occurs if the domain itself does not exist). Many domains are still IPv4-only and have no AAAA records — this is normal. If you expect an AAAA record to exist, check that your DNS provider has saved the record correctly and that sufficient TTL time has passed for propagation.