IPv6 passes half of Google’s users: what the milestone does and doesn’t mean

On 28 March 2026, for the first time, 50.1% of the users reaching Google that day came over IPv6, up from about 46% a year earlier. It is one company measuring its own users, but it is the most-quoted gauge of IPv6 adoption there is. Mobile carriers got there years ago (many phone networks are v6-only inside, translating at the edge) and home broadband has quietly followed.

So is IPv4 dying?

No, and that is the interesting part. The majority flipped because a handful of giants (the streaming, social and cloud platforms that dominate volume) are fully dual-stacked. The site count tells the opposite story: the long tail of the web, millions of smaller sites, remains v4-only behind ever-more-creative NAT. Users of the biggest platforms are now majority v6; websites are still majority v4. Both facts are true, and knowing why is a genuinely good interview answer.

The economics have shifted from push to pull: an IPv4 address now costs real money on the transfer market, while v6 space is effectively free. Every new deployment that starts dual-stack is one less reason for the old protocol to exist, but the tail will be decades long.

What learners should do about it

Stop treating v6 as the optional chapter. Enable it on your home lab, watch its neighbour discovery replace ARP in a capture, and get comfortable reading eight hex groups. The IPv6 lesson covers the two shortening rules that make addresses readable.