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 (Feb 2018)

  ISP IPv6 tests count
1.Comcast Cable Communications23,886
2.Spectrum12,328
3.Google Inc.12,296
4.Cellco Partnership DBA Verizon Wireless11,469
5.Hurricane Electric9,984
6.AT&T Internet Services8,160
7.Cox Communications Inc.4,975
8.Charter Communications4,883
9.CenturyLink2,101
10.AT&T Mobility LLC1,578
11.T-Mobile USA1,393
12.Choopa1,066
13.Mediacom Communications Corp973
14.Sprint771
15.Microsoft Corp687
16.Linode591
17.AT&T Services489
18.IT7 Networks Inc470
19.Google Fiber Inc.451
20.Digital Ocean443
21.QuadraNet439
22.RamNode LLC427
23.InfoWest333
24.MCI Communications Services238
25.Midcontinent Communications229

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, Feb 2018)

  ISP Unique IPv6 addresses
1.Comcast Cable Communications13,947
2.Cellco Partnership DBA Verizon Wireless8,991
3.Spectrum6,696
4.Hurricane Electric4,953
5.AT&T Internet Services4,332
6.Cox Communications Inc.2,901
7.Charter Communications2,673
8.CenturyLink1,198
9.T-Mobile USA1,075
10.AT&T Mobility LLC1,000
11.Mediacom Communications Corp563
12.Microsoft Corp558
13.Sprint550
14.Choopa404
15.RamNode LLC350
16.AT&T Services348
17.Google Inc.307
18.Google Fiber Inc.296
19.IT7 Networks Inc177
20.Apnic Portables8169
21.Linode146
22.Digital Ocean146
23.Webpass Inc.137
24.Road Runner132
25.MCI Communications Services131

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 (Feb 2018)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.WiLine Networks Inc.1200.0%12100.0%
2.University of Wisconsin Madison500.0%5100.0%
3.Unite Private Networks LLC.500.0%5100.0%
4.Selectronics Corp.1200.0%12100.0%
5.Fibertech Networks5300.0%53100.0%
6.University of Rochester600.0%6100.0%
7.Kingsburg Media Foundation700.0%7100.0%
8.Buaa6-cernet21500.0%15100.0%
9.Delta Centric LLC1200.0%12100.0%
10.Nola Broadband Inc700.0%7100.0%
11.Claro S.a.500.0%5100.0%
12.SnapServ Ltd3200.0%32100.0%
13.Cenic1400.0%14100.0%
14.Washington & Jefferson College800.0%8100.0%
15.Pilot Fiber900.0%9100.0%
16.Area-Wide Technologies900.0%9100.0%
17.Ability Business700.0%7100.0%
18.Oklahoma State Regents Higher Education700.0%7100.0%
19.Accenture LLP2600.0%26100.0%
20.China Unicom1000.0%10100.0%
21.Sam Houston State University800.0%8100.0%
22.Georgia Institute of Technology1000.0%10100.0%
23.Daktronics600.0%6100.0%
24.National Aeronautics and Space Administration500.0%5100.0%
25.CarolinaConnect Cooperative7700.0%77100.0%

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 (Feb 2018)

  ISP Test count IPv6 average
1.Columbia University24382.1 Mbps
2.Joe's Datacenter7366.4 Mbps
3.Google Inc.12,296351.5 Mbps
4.Yomura Corporation7212.3 Mbps
5.University of Pennsylvania9211.8 Mbps
6.Google Incorporated144204.9 Mbps
7.Kingsburg Media Foundation7147.0 Mbps
8.Google Fiber Inc.451124.9 Mbps
9.Syringa Networks5120.7 Mbps
10.Fork Networking6119.1 Mbps
11.MCI Communications Services238109.4 Mbps
12.State of Wyoming Department A&I2398.9 Mbps
13.Verizon Online LLC17786.2 Mbps
14.Frontier Communications Corporation5384.1 Mbps
15.ICS Advanced Technologies776.4 Mbps
16.Road Runner HoldCo LLC1375.1 Mbps
17.University of California3374.5 Mbps
18.FranTech Solutions4074.5 Mbps
19.OARnet769.3 Mbps
20.Mediacom Communications Corp97368.8 Mbps
21.Kinber2668.4 Mbps
22.Facebook Inc9367.7 Mbps
23.vanoppen.biz LLC766.6 Mbps
24.Synacor1465.7 Mbps
25.Charter Communications4,88364.6 Mbps