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 (May 2020)

  ISP IPv6 tests count
1.Spectrum6,281
2.Comcast Cable Communications, LLC6,193
3.Hurricane Electric LLC2,358
4.Cellco Partnership DBA Verizon Wireless2,337
5.AT&T Services, Inc.2,324
6.Cox Communications Inc.1,433
7.Cloudflarewarp921
8.Google LLC871
9.T-Mobile USA, Inc.486
10.CenturyLink Communications, LLC410
11.AT&T Mobility LLC297
12.Mediacom Communications Corp257
13.Choopa250
14.Sprint204
15.Google Fiber Inc.170
16.QuadraNet Enterprises LLC166
17.Verizon Communications120
18.CarolinaConnect Cooperative103
19.DigitalOcean, LLC101
20.Total Server Solutions L.L.C.101
21.Linode, LLC92
22.M247 Ltd73
23.Condointernet.net72
24.Connecticut Education Network72
25.FranTech Solutions71

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, May 2020)

  ISP Unique IPv6 addresses
1.Comcast Cable Communications, LLC3,683
2.Spectrum3,204
3.Cellco Partnership DBA Verizon Wireless1,514
4.AT&T Services, Inc.1,437
5.Hurricane Electric LLC956
6.Cox Communications Inc.786
7.Cloudflarewarp489
8.T-Mobile USA, Inc.335
9.CenturyLink Communications, LLC232
10.AT&T Mobility LLC226
11.Mediacom Communications Corp156
12.Google Fiber Inc.124
13.Sprint116
14.Choopa96
15.Google LLC77
16.Verizon Communications58
17.Connecticut Education Network50
18.Condointernet.net47
19.Chinanet42
20.M247 Ltd41
21.Midcontinent Communications39
22.Frontier Communications Solutions36
23.DigitalOcean, LLC34
24.Cincinnati Bell Telephone Company LLC30
25.Monkey Brains30

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 (May 2020)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Gf-lax1700.0%17100.0%
2.FirstDigital Communications700.0%7100.0%
3.Sho Me Technologies, LLC500.0%5100.0%
4.Symantec Corporation2000.0%20100.0%
5.Microsoft Corp500.0%5100.0%
6.The Light Plant Commission of the City of Paragould500.0%5100.0%
7.Simply Cyber Inc600.0%6100.0%
8.The Municipal Communications Utility of the City of Cedar Falls, Iowa500.0%5100.0%
9.Cstnet700.0%7100.0%
10.Greenlight Networks600.0%6100.0%
11.Nynex1700.0%17100.0%
12.Tierzero500.0%5100.0%
13.xTom.com500.0%5100.0%
14.NetSpeed LLC700.0%7100.0%
15.Eonix Corporation700.0%7100.0%
16.Hughes Network Systems2200.0%22100.0%
17.ProXad network / Free500.0%5100.0%
18.QuadraNet Enterprises LLC16621.2%16498.8%
19.Google6323.2%6196.8%
20.RIPE Network Coordination Center3013.3%2996.7%
21.Wowrack.com1915.3%1894.7%
22.Digi Desert LLC4337.0%4093.0%
23.Cellco Partnership DBA Verizon Wireless2,3371777.6%2,16092.4%
24.Sprint204167.8%18892.2%
25.T-Mobile USA, Inc.486408.2%44691.8%

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 (May 2020)

  ISP Test count IPv6 average
1.Ovh Sas7317.2 Mbps
2.Midcontinent Communications63213.5 Mbps
3.Choopa250111.3 Mbps
4.Comcast Cable Communications, LLC6,19393.6 Mbps
5.Webpass Inc.4191.1 Mbps
6.Spectrum6,28188.3 Mbps
7.ICS Advanced Technologies884.0 Mbps
8.Cox Communications Inc.1,43375.2 Mbps
9.M247 Ltd7371.9 Mbps
10.Digi Desert LLC4369.1 Mbps
11.Mediacom Communications Corp25768.1 Mbps
12.CenturyLink Communications, LLC41068.1 Mbps
13.Google LLC87166.7 Mbps
14.Amazon.com1065.8 Mbps
15.Quintex Alliance Consulting4463.3 Mbps
16.Hurricane Electric LLC2,35862.1 Mbps
17.Cincinnati Bell Telephone Company LLC3861.4 Mbps
18.Google Fiber Inc.17060.1 Mbps
19.DigitalOcean, LLC10159.8 Mbps
20.Verizon Communications12052.7 Mbps
21.AT&T Services, Inc.2,32447.7 Mbps
22.Monkey Brains5647.4 Mbps
23.Hancock Rural Telephone Corp.1045.5 Mbps
24.Google6345.0 Mbps
25.Linode5936.2 Mbps