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 (Nov 2017)

  ISP IPv6 tests count
1.Comcast Cable Communications21,479
2.Google Inc.13,606
3.Spectrum13,204
4.Hurricane Electric13,029
5.Cellco Partnership DBA Verizon Wireless8,881
6.AT&T Internet Services6,166
7.Charter Communications5,163
8.Cox Communications Inc.4,869
9.AT&T Mobility LLC2,361
10.CenturyLink2,207
11.T-Mobile USA1,474
12.Choopa1,261
13.IT7 Networks Inc809
14.Mediacom Communications Corp665
15.Digital Ocean517
16.AT&T Services494
17.Google Fiber Inc.468
18.Sprint422
19.Microsoft Corp417
20.Linode416
21.Condointernet.net302
22.Digitalocean289
23.Road Runner217
24.Kit Carson Electric Cooperative212
25.MCI Communications Services211

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, Nov 2017)

  ISP Unique IPv6 addresses
1.Comcast Cable Communications13,026
2.Hurricane Electric8,003
3.Cellco Partnership DBA Verizon Wireless7,442
4.Spectrum7,075
5.AT&T Internet Services3,421
6.Cox Communications Inc.2,899
7.Charter Communications2,664
8.AT&T Mobility LLC1,555
9.CenturyLink1,220
10.T-Mobile USA1,108
11.Choopa575
12.Mediacom Communications Corp425
13.Microsoft Corp351
14.AT&T Services346
15.IT7 Networks Inc278
16.Sprint277
17.Google Inc.268
18.Google Fiber Inc.265
19.Condointernet.net156
20.Digital Ocean153
21.Road Runner136
22.MCI Communications Services129
23.Webpass Inc.118
24.Mf-transix-w116
25.Linode113

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 (Nov 2017)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.BCI Mississippi Broadband500.0%5100.0%
2.Tango500.0%5100.0%
3.Wells Fargo & Company1300.0%13100.0%
4.WorldPath Internet Services700.0%7100.0%
5.Unitymedia500.0%5100.0%
6.Akamai Technologies800.0%8100.0%
7.The Light Plant Commission of the City of Paragould900.0%9100.0%
8.Facebook Ireland Ltd700.0%7100.0%
9.Google700.0%7100.0%
10.Community Communications Company1100.0%11100.0%
11.Florida Department of Management Services700.0%7100.0%
12.University of Wisconsin Madison1400.0%14100.0%
13.Virginia Polytechnic Institute and State Univ.700.0%7100.0%
14.ScanSource Inc.600.0%6100.0%
15.Yahoo!1500.0%15100.0%
16.PrivateSystems Networks900.0%9100.0%
17.Zayo Bandwidth500.0%5100.0%
18.Uninet S.A. de C.V.600.0%6100.0%
19.Spectra Logic Corporation1600.0%16100.0%
20.WiLine Networks Inc.3300.0%33100.0%
21.Kinber800.0%8100.0%
22.Hammer Fiber500.0%5100.0%
23.Lightspeed Communications700.0%7100.0%
24.123.Net900.0%9100.0%
25.Quantcast Corporation800.0%8100.0%

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 (Nov 2017)

  ISP Test count IPv6 average
1.CarolinaConnect Cooperative87661.6 Mbps
2.Microsoft Corp417527.7 Mbps
3.Google Inc.13,606327.9 Mbps
4.DataShack17267.5 Mbps
5.Packet Host5260.9 Mbps
6.Microsoft Corporation8245.1 Mbps
7.General Communication20233.9 Mbps
8.Amazon.com159211.6 Mbps
9.Greenlight Networks29172.5 Mbps
10.Zayo Bandwidth5144.8 Mbps
11.Aruba Networks6125.4 Mbps
12.Google Incorporated124104.6 Mbps
13.American Registry Internet Numbers4599.9 Mbps
14.University of Pittsburgh1298.2 Mbps
15.Utah Education Network990.9 Mbps
16.Lightspeed Communications789.8 Mbps
17.University of Wisconsin Madison1489.6 Mbps
18.U.S. Dept. of Commerce1385.5 Mbps
19.University of Pennsylvania2484.1 Mbps
20.State University of New York at Buffalo20481.0 Mbps
21.Kingsburg Media Foundation1780.5 Mbps
22.University of South Florida Board of Trustees1679.5 Mbps
23.CenturyLink2,20775.4 Mbps
24.Cascadelink Inc675.2 Mbps
25.BCI Mississippi Broadband570.6 Mbps