AAAA record
An AAAA record maps a hostname to an IPv6 address, the same job an A record does for IPv4, just for a 128-bit address instead of a 32-bit one. RFC 3596 defines the AAAA record type specifically for this purpose, as part of the broader set of DNS extensions written to support IPv6 alongside the existing IPv4-oriented record types. A dual-stack domain typically publishes both an A and an AAAA record for the same hostname, letting a connecting client's resolver choose whichever address family it and the network path actually support; a domain with only an A record is IPv4-only regardless of whether the server itself supports IPv6. AdminKit's DNS lookup tool queries AAAA records alongside A, MX, TXT, NS and CAA for any domain, so a missing AAAA record is easy to spot when auditing a domain's IPv6 readiness.
By AdminKit team, Netbase JSC · Updated