Web protocol adoption statistics - IPv6, HTTP/3 and TLS

What percentage of the internet supports IPv6?

Note: IPv6 adoption figures vary by measurement method, so different trackers report different shares.

• Google shows about 45% to 50% of its traffic over IPv6, having just touched majority for the first time on March 28, 2026.
• Cloudflare Radar also tracks IPv6 request share, but its figures vary by date range and by whether the metric is all requests, human traffic or IPv6-capable dual-stack traffic.
• APNIC-style capability measurements put global IPv6 capability at roughly 42% to 43%, depending on date and weighting method.
• The gaps reflect different measurement methods, not contradictions.
• IPv6 offers 340 undecillion addresses, versus IPv4’s 4.3 billion.

Reaching majority is a real milestone after a famously slow rollout. The varying figures all tell the same story: IPv6 is now mainstream, even if IPv4 stubbornly persists thanks to network address translation that stretched its limited supply for decades.

What is HTTP/2 and HTTP/3 adoption across websites?

Note: shares differ by method, since request-level measures (Cloudflare) and site-level ones (W3Techs) count differently.

• In Cloudflare’s 2025 Year in Review, HTTP/2 handled about 50% of request traffic.
• HTTP/1.x carried about 29%, and HTTP/3 about 21%.
• HTTP/3 remains around one-fifth of Cloudflare request traffic in recent public readings, well behind HTTP/2.
• By website support, W3Techs shows a higher HTTP/3 figure than Cloudflare’s request-level share, because it measures site-level usage rather than request negotiation.
• HTTP/3 needs QUIC support, which many origin servers have not enabled.

The HTTP/3 plateau is the surprise. Despite being the newest standard, it remains far behind HTTP/2 in request-level usage, partly because HTTP/3 depends on QUIC support and real-world negotiation across browsers, CDNs and servers.

What share of traffic uses TLS 1.3?

• TLS 1.3 now carries the clear majority of secure HTTP traffic in Cloudflare Radar’s protocol view.
• It has overtaken TLS 1.2 in Cloudflare-observed secure HTTP traffic, though adoption varies by client, server and network.
• TLS 1.3 offers faster handshakes and stronger security than its predecessor.
• Cloudflare’s 2025 Year in Review reported post-quantum encrypted traffic rising from 29% to 52% during 2025, within its TLS 1.3 traffic view.
• Older TLS versions are being actively phased out across the web.

Encryption is the one area moving fast. Unlike HTTP/3, TLS 1.3 and post-quantum key exchange have benefited from browser and major-network defaults, helping adoption move quickly across Cloudflare-observed traffic.

How fast is IPv6 adoption growing?

• IPv6 took about 18 years to reach majority adoption since Google began tracking it in 2008.
• Recent growth has been steady but uneven, with Google and APNIC-style measurements moving at different rates.
• Growth is tied to ISP, mobile-network and content-provider deployment decisions, as well as pressure from IPv4 scarcity.
• The Asia-Pacific region, served by APNIC, passed 50% adoption in 2025.
• Adoption varies sharply by country and network, with both mature and fast-growing markets appearing among the leaders.

The pace has been famously patient. IPv6’s two-decade climb reflects how hard it is to upgrade core internet plumbing, but with IPv4 address space long exhausted and major ISPs, mobile networks and content providers deploying IPv6, the transition has finally reached a tipping point.

What is IPv6 adoption by country?

• In the Internet Society’s April 2026 snapshot, France was around 73% IPv6 adoption.
• India was close behind at about 72%.
• Saudi Arabia was around 65%, with Malaysia near 60%.
• The United States is above 50% in current Google-style country rankings.
• In the same Internet Society snapshot, lower-adoption examples included Italy (17%), Spain (10%) and Egypt (4%).

The country gaps show that IPv6 adoption depends heavily on local network operators, mobile carriers, market structure and IPv4 scarcity. Some countries moved quickly, while others still rely heavily on IPv4. See our DNS statistics research.

Sources & additional resources

• Google. “IPv6 Adoption Statistics.” Google.
• Cloudflare. “Adoption and Usage Worldwide.” Cloudflare Radar.
• W3Techs. “Usage Statistics of HTTP/2.” W3Techs.
• W3Techs. “Usage Statistics of HTTP/3.” W3Techs.
• APNIC. “IPv6 Capability Measurements.” APNIC Labs.
• Internet Society. “18 Years Later, IPv6 Reaches Majority.” Internet Society Pulse.
• Cloudflare. “Cloudflare Radar 2025 Year in Review.” Cloudflare.

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