The internet has been built on IPv4 for decades, and the limits of that protocol grow more visible every year. IPv4 offers about 4.3 billion addresses, which has not been enough for the modern device population for a long time. IPv6 was created to solve this and it is steadily being adopted across the infrastructure. The AAAA record is the key building block for using domain names with this newer protocol.
An AAAA record (pronounced "quad-A") is technically very similar to an A record but stores an IPv6 address instead of IPv4. The four letters are not accidental: IPv6 addresses are 128 bits long, four times the size of IPv4. An IPv6 address looks like "2a02:6b8::1" or in full form "2a02:06b8:0000:0000:0000:0000:0000:0001".
Why IPv6 matters now
The IPv4 pool was officially exhausted in 2011 and providers compensate with NAT, sharing one IP among many users. NAT is a temporary fix that breaks peer-to-peer connectivity, complicates some protocols and prevents site owners from seeing real client IPs.
Mobile carriers lead the IPv6 adoption charge. In many countries more than 70 percent of mobile traffic runs natively on IPv6. If your site only has IPv4, mobile clients pass through extra NAT64 translation and connection setup grows noticeably slower.
Adding an AAAA record
The process is almost identical to adding an A record: in the DNS panel you specify the host, the record type and the IPv6 address. The main difference is that IPv6 addresses are long and easy to mistype, so it is best to copy them directly from your hosting control panel.
IPv6 simplification uses two rules: consecutive zero groups can be replaced with "::" (only once per address), and leading zeros in each group can be omitted. So "2a02:06b8:0000:0000:0000:0000:0000:0001" becomes "2a02:6b8::1".
Dual-stack is the right call
The best recommendation today is dual-stack โ running both A and AAAA records simultaneously. The approach lets clients use whichever protocol is available and leaves nobody behind.
Browsers and operating systems apply the Happy Eyeballs algorithm in dual-stack environments, racing both protocols and using whichever responds first. This masks transient IPv6 issues without the user noticing anything.
IPv6 security nuances
Moving to IPv6 means revisiting firewall rules. If your firewall only covers IPv4, IPv6 traffic can bypass your controls. Every IPv4 rule needs an equivalent IPv6 rule.
It is also a mistake to assume IPv6 is unscannable due to its size. Attackers leverage DNS records and smart enumeration, so traditional defenses still apply.
Sayt.uz practice
About 42 percent of Sayt.uz hosted sites now run dual-stack, up from 28 percent a year ago. Sites with full IPv6 see roughly 18 percent faster connection times for mobile users in our measurements.
IPv6 is enabled by default on every Sayt.uz hosting plan with no extra fee. Even the starter plan at 39 000 soum per month includes an IPv6 address with automatic AAAA provisioning. A .uz domain costs 119 000 soum per year and adding AAAA is free.