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 (Dec 2019)

  ISP IPv6 tests count
1.Comcast Cable Communications, LLC6,060
2.Spectrum5,036
3.Cellco Partnership DBA Verizon Wireless2,787
4.AT&T Services, Inc.1,841
5.Hurricane Electric LLC1,832
6.Cox Communications Inc.1,196
7.Google LLC1,057
8.Cloudflarewarp957
9.CenturyLink Communications, LLC582
10.T-Mobile USA, Inc.558
11.Choopa519
12.Sprint391
13.AT&T Mobility LLC390
14.Frontier Communications Solutions251
15.Mediacom Communications Corp248
16.Multacom Corporation227
17.M247 Ltd134
18.Google Fiber Inc.123
19.RamNode LLC115
20.tzulo, inc.114
21.Cincinnati Bell Telephone Company LLC100
22.American Registry Internet Numbers98
23.Midcontinent Communications83
24.Linode77
25.DigitalOcean, LLC73

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, Dec 2019)

  ISP Unique IPv6 addresses
1.Comcast Cable Communications, LLC3,568
2.Spectrum2,844
3.Cellco Partnership DBA Verizon Wireless2,023
4.AT&T Services, Inc.1,114
5.Hurricane Electric LLC800
6.Cox Communications Inc.709
7.Cloudflarewarp481
8.T-Mobile USA, Inc.426
9.CenturyLink Communications, LLC354
10.Sprint302
11.AT&T Mobility LLC260
12.Choopa224
13.Google LLC158
14.Mediacom Communications Corp146
15.Google Fiber Inc.89
16.Frontier Communications Solutions64
17.Cincinnati Bell Telephone Company LLC54
18.American Registry Internet Numbers53
19.Midcontinent Communications51
20.M247 Ltd38
21.Webpass Inc.36
22.DigitalOcean, LLC34
23.Multacom Corporation32
24.Linode30
25.Verizon Communications30

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.

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 (Dec 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Llc Baxet2700.0%27100.0%
2.C1813900.0%39100.0%
3.DirectSpace Networks600.0%6100.0%
4.Everywhere Wireless800.0%8100.0%
5.Database by Design, LLC900.0%9100.0%
6.AxcelX Technologies LLC500.0%5100.0%
7.Google3700.0%37100.0%
8.Orange S.A.600.0%6100.0%
9.Perfect International, Inc500.0%5100.0%
10.HEG US Inc700.0%7100.0%
11.Tobias Maedel700.0%7100.0%
12.Wowrack.com2300.0%23100.0%
13.Claro S.a600.0%6100.0%
14.Greenlight Networks500.0%5100.0%
15.ICS Advanced Technologies500.0%5100.0%
16.Central Virginia Services, INC500.0%5100.0%
17.Nynex800.0%8100.0%
18.Cisco Systems900.0%9100.0%
19.Wells Fargo & Company600.0%6100.0%
20.University of Michigan700.0%7100.0%
21.The Linux Fix700.0%7100.0%
22.DataCity600.0%6100.0%
23.University of Wisconsin Madison700.0%7100.0%
24.H4Y Technologies LLC600.0%6100.0%
25.Gf-lax1800.0%18100.0%

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 (Dec 2019)

  ISP Test count IPv6 average
1.Google LLC1,057335.0 Mbps
2.Indiana University14164.4 Mbps
3.Google Fiber Inc.123160.6 Mbps
4.American Registry Internet Numbers98148.4 Mbps
5.M247 Ltd134135.3 Mbps
6.Amazon Technologies Inc15126.4 Mbps
7.Choopa, LLC6105.2 Mbps
8.Comcast Cable Communications, LLC6,06098.5 Mbps
9.Spectrum5,03685.8 Mbps
10.Linode7785.6 Mbps
11.University of Wisconsin Madison781.3 Mbps
12.Mediacom Communications Corp24873.4 Mbps
13.Cox Communications Inc.1,19672.0 Mbps
14.Total Server Solutions L.L.C.3671.8 Mbps
15.Verizon Communications6171.1 Mbps
16.AT&T Services, Inc.1,84158.9 Mbps
17.Condointernet.net4151.3 Mbps
18.Cincinnati Bell Telephone Company LLC10050.0 Mbps
19.Hurricane Electric LLC1,83241.9 Mbps
20.Midcontinent Communications8341.9 Mbps
21.FranTech Solutions3338.9 Mbps
22.Apple Inc.837.1 Mbps
23.CenturyLink Communications, LLC58235.2 Mbps
24.T-Mobile USA, Inc.55834.3 Mbps
25.Cogent Communications3431.4 Mbps