Half of Google users are on IPv6, but your home router may not be

Google measured IPv6 use at just under 51 percent on October 17, 2026, up from about 33 percent in 2020, but many routers still ship with it off. This affects peer-to-peer gaming, smart home devices, and VPN security.

What happened

IPv6 has more available addresses than the internet could ever hope to use, but not all devices are taking advantage yet. Google’s IPv6 page reports that roughly half of its users connect via IPv6, and most routers available today support it alongside IPv4 in a setup called dual stack. However, many home routers still have IPv6 switched off.

IPv4 was introduced in 1981 with 32-bit addresses and created around 4.3 billion addresses. Those ran out: the Internet Assigned Numbers Authority assigned its last blocks to regional registries in February 2011, and North America’s allocation ran dry in September 2015. Home routers now use Network Address Translation, or NAT, to give every device a private address behind one public address. Many internet providers also use carrier-grade NAT, which places groups of customers behind shared public addresses.

Google measured IPv6 use at just under 51 percent of its users on October 17, 2026, up from about 33 percent on the same day in 2020. Globally, France leads at 87 percent, while the US sits at 55 percent and China at just over six percent. IPv6 was first standardized in 1995 with 128-bit addresses — around 340 undecillion (10^36) of them.

Key facts

• Google measured IPv6 use at just under 51 percent of its users on October 17, 2026, up from about 33 percent on the same day in 2020.
• France leads IPv6 adoption at 87 percent, while the US sits at 55 percent and China at just over six percent.
• CableLabs and several ISPs tested everyday apps behind ISP NAT in 2013; web browsing and Netflix worked fine, but peer-to-peer Xbox game connections died when both players shared a public address.
• According to APNIC, around 85 percent of Comcast and AT&T users have IPv6 access, while Frontier sits below 25 percent.
• IPv6 provides around 340 undecillion (10^36) addresses; TechTarget says every grain of sand on Earth could have billions of IP addresses, or every person could have several octillion.

Our analysis

For creators and operators who run live streams, multiplayer gaming sessions, or smart home setups, this is not just a backend infrastructure story. Carrier-grade NAT adds a second layer of translation that a home router does not control. The source reports that a connection coming in from the internet might not find its way to the right customer. That is usually fine for browsing, but it can break peer-to-peer gaming and similar direct connections. The CableLabs test finding that peer-to-peer Xbox connections died when both players shared a public address suggests that creators who rely on console multiplayer or remote play may still be running into avoidable connectivity problems.

The adoption gap matters too. With China at just over six percent, cross-border communities and operators working with users in lower-adoption regions likely face more carrier-grade NAT behavior. That does not mean their networks fail, but it does suggest peer-to-peer features may be less reliable unless IPv6 is enabled end to end. At the same time, IPv6 will not make Wi-Fi faster, and if a network already does what the user needs, the source says there is no compelling reason to change settings. The real risk appears when operators add more devices, replace routers, or rely on VPNs that only tunnel IPv4.

What it means for operators

• Check your router’s IPv6 setting only if you run peer-to-peer apps such as online gaming or Thread/Matter smart home devices. If your network works fine, the source says there is no compelling reason to start changing settings.
• If you enable IPv6, make sure the router’s IPv6 firewall is on. The firewall takes over the filtering job NAT used to do, and manufacturers may default to an open transparent mode.
• For creators using VPNs, verify whether the VPN tunnels IPv6. If it only tunnels IPv4, IPv6 traffic can slip outside the tunnel, so disable IPv6 on that device or choose an IPv6-aware VPN.
• When replacing a router, make sure IPv6 is switched on and behind the firewall. Devices that only speak IPv4 will still work, but every new device you add otherwise stays squeezed behind a single IPv4 address.