United States IPv6 in United States

These graphs show the evolution of default protocol, v6 address types, and average bandwidth in United States over time.

They are generated using the data collected by the ipv6-test.com connection test page, and are updated on a monthly basis.

Overall IPv6 and v4 protocol support in United States

This graph shows the evolution of IPv6 support vs IPv4 for all our connection test.

The numbers are percentages, so we can expect almost 100% of hosts supporting IPv4 with a slow growth for IPv6.

Top 25 internet service providers for IPv6 in United States (Sep 2023)

  ISP IPv6 tests count
1.Comcast Cable Communications, LLC1,942
2.AT&T Services, Inc.1,280
3.Charter Communications Inc962
4.Verizon Business958
5.Hurricane Electric LLC574
6.T-Mobile USA, Inc.492
7.Charter Communications488
8.Cox Communications Inc.320
9.I-Evolve Technology Services250
10.Cloudflare, Inc.238
11.SpaceX Starlink222
12.CenturyLink Communications, LLC157
13.The Constant Company153
14.Google Fiber Inc.144
15.Charter Communications, Inc113
16.Google LLC77
17.Cincinnati Bell Telephone Company LLC74
18.M247 Europe SRL73
19.The Constant Company, LLC69
20.Akamai Technologies, Inc.62
21.Cloudie Networks48
22.SoftLayer44
23.Google, LLC40
24.AT&T Mobility LLC39
25.Chinanet36

IPv6 and v4 protocol support in United States (unique addresses)

This graph shows the evolution of IPv6 support vs IPv4 for unique users of our connection test.

The numbers are percentages, so we can expect a slow growth towards 50% v4 / 50% v6.

Top 25 internet service providers for IPv6 in United States (unique addresses, Sep 2023)

  ISP Unique IPv6 addresses
1.Comcast Cable Communications, LLC1,082
2.AT&T Services, Inc.733
3.Charter Communications Inc570
4.Verizon Business535
5.T-Mobile USA, Inc.348
6.Hurricane Electric LLC323
7.Charter Communications299
8.Cloudflare, Inc.203
9.Cox Communications Inc.196
10.I-Evolve Technology Services137
11.SpaceX Starlink133
12.Google Fiber Inc.78
13.CenturyLink Communications, LLC77
14.Charter Communications, Inc70
15.The Constant Company56
16.Akamai Technologies, Inc.48
17.AT&T Mobility LLC31
18.Cincinnati Bell Telephone Company LLC31
19.Google, LLC30
20.M247 Europe SRL26
21.Google LLC26
22.Ericsson Inc.25
23.Chinanet24
24.Mediacom Communications Corp22
25.HERN Labs AB21

Default browser protocol in United States

This graph shows the percentage of browsers that default to IPv6 vs. IPv4 when visiting the ipv6-test connection test.

Hopefully, in the not so distant future, the v6 part will grow taller than the v4 one.

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Default browser protocol in United States (dual-stack users)

This graph shows the percentage of browsers that default to IPv6 vs. IPv4 for users that have both v4 and v6 connectivity.

Usually a system will default to v6 when it's available, but in some cases with tunneled connections, v4 stays the default.

Top 25 internet service providers for IPv6 default in United States (Sep 2023)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Kurun Cloud Inc1400.0%14100.0%
2.Leaseweb USA700.0%7100.0%
3.Xipe Networks600.0%6100.0%
4.Netfee1100.0%11100.0%
5.The Constant Company, LLC6922.9%6797.1%
6.The Constant Company15385.2%14594.8%
7.Rogers Communications Canada Inc.7114.3%685.7%
8.Datacamp Limited11218.2%981.8%
9.Contabo Inc.25520.0%2080.0%
10.HERN Labs AB29724.1%2275.9%
11.Greenlight Networks, LLC12325.0%975.0%
12.Subrigo Corporation16425.0%1275.0%
13.MoeKuu LLC7228.6%571.4%
14.Zayo Bandwidth21628.6%1571.4%
15.Ovh Sas14428.6%1071.4%
16.tzulo, inc.18633.3%1266.7%
17.Google Fiber Inc.1444833.3%9666.7%
18.Cincinnati Bell Telephone Company LLC742533.8%4966.2%
19.Fastly, Inc.20735.0%1365.0%
20.AT&T Mobility LLC391435.9%2564.1%
21.Mediacom Communications Corp24937.5%1562.5%
22.Hetzner Online GmbH16637.5%1062.5%
23.Charter Communications48818337.5%30562.5%
24.Charter Communications Inc96236237.6%60062.4%
25.Cloudflare, Inc.2389037.8%14862.2%

IPv6 address types in United States

Here you can see the evolution of address types over time, and measure usage of 6to4 and Teredo tunneled connectivity.

It should be noted that because 6rd works with native addresses, it cannot be detected here as tunneled. This is also the case with VPN based tunnels.

Downstream bandwidth in United States

This graph illustrates the connection speed gap between IPv4 and IPv6, numbers represent v6 speed as percentage of v4 speed.

The lower IPv6 speeds are often caused by tunneling overhead or insufficient v6 connectivity or peering capacity at ISPs.

Top 25 internet service providers for IPv6 speed in United States (Sep 2023)

  ISP Test count IPv6 average
1.Charter Communications488168.8 Mbps
2.Comcast Cable Communications, LLC1,942132.6 Mbps
3.Verizon Business958126.7 Mbps
4.AT&T Services, Inc.1,280124.3 Mbps
5.CenturyLink Communications, LLC157115.4 Mbps
6.Charter Communications, Inc113113.9 Mbps
7.Google Fiber Inc.144108.6 Mbps
8.Charter Communications Inc96299.7 Mbps
9.Cloudie Networks4892.3 Mbps
10.Performive LLC1591.7 Mbps
11.I-Evolve Technology Services25089.7 Mbps
12.Cox Communications Inc.32082.9 Mbps
13.Cincinnati Bell Telephone Company LLC7482.3 Mbps
14.Cloudflare, Inc.23875.1 Mbps
15.American Registry Internet Numbers572.9 Mbps
16.AT&T Mobility LLC3972.9 Mbps
17.Linode1365.2 Mbps
18.T-Mobile USA, Inc.49263.0 Mbps
19.Cogent Communications559.3 Mbps
20.Hurricane Electric LLC57457.1 Mbps
21.SpaceX Starlink22257.1 Mbps
22.Multacom Corporation3047.4 Mbps
23.United Electric Cooperative642.8 Mbps
24.Microsoft Corporation1642.2 Mbps
25.Akamai Technologies, Inc.6236.1 Mbps
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