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 (Apr 2018)

  ISP IPv6 tests count
1.Comcast Cable Communications26,290
2.Google Inc.17,529
3.Spectrum14,950
4.Hurricane Electric8,997
5.Cellco Partnership DBA Verizon Wireless7,215
6.AT&T Internet Services7,010
7.Cox Communications Inc.5,231
8.Charter Communications5,065
9.CenturyLink2,420
10.Google LLC2,042
11.AT&T Mobility LLC1,783
12.T-Mobile USA1,644
13.Choopa1,508
14.Mediacom Communications Corp1,194
15.Sprint1,045
16.Linode766
17.AT&T Services591
18.Google Fiber Inc.536
19.Microsoft Corp512
20.Digital Ocean501
21.IT7 Networks Inc470
22.American Registry Internet Numbers362
23.MCI Communications Services333
24.Digitalocean327
25.Apnic Portables8314

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, Apr 2018)

  ISP Unique IPv6 addresses
1.Comcast Cable Communications15,101
2.Spectrum7,808
3.Cellco Partnership DBA Verizon Wireless5,749
4.Hurricane Electric3,976
5.AT&T Internet Services3,826
6.Cox Communications Inc.2,941
7.Charter Communications2,706
8.CenturyLink1,357
9.T-Mobile USA1,199
10.AT&T Mobility LLC1,053
11.Sprint758
12.Mediacom Communications Corp641
13.Choopa594
14.AT&T Services450
15.Microsoft Corp411
16.Google Fiber Inc.347
17.Apnic Portables8285
18.Google Inc.256
19.MCI Communications Services184
20.IT7 Networks Inc183
21.Hurricane Electric LLC171
22.Digital Ocean158
23.Arris Group149
24.Digitalocean148
25.Linode142

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 (Apr 2018)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Omnificent Systems Inc500.0%5100.0%
2.RAM Host500.0%5100.0%
3.University of Maryland Baltimore County (UMBC)1000.0%10100.0%
4.Wells Fargo & Company600.0%6100.0%
5.UPC CH - Cablecom1200.0%12100.0%
6.Conseev LLC500.0%5100.0%
7.Fibertech Networks3300.0%33100.0%
8.National Science Foundation600.0%6100.0%
9.Silver Star Communications2300.0%23100.0%
10.Interserver700.0%7100.0%
11.Kingsburg Media Foundation500.0%5100.0%
12.Synacor600.0%6100.0%
13.Internet21100.0%11100.0%
14.Environmental Protection Agency800.0%8100.0%
15.Pilot Fiber800.0%8100.0%
16.The Pennsylvania State University600.0%6100.0%
17.Facebook Ireland Ltd1600.0%16100.0%
18.Accenture LLP1700.0%17100.0%
19.Surf Air Wireless500.0%5100.0%
20.Delta Centric LLC1200.0%12100.0%
21.Hosting Solution Ltd.1000.0%10100.0%
22.T-Mobile Hungary500.0%5100.0%
23.Ovh Us Llc500.0%5100.0%
24.Kinber7100.0%71100.0%
25.Netrouting Inc.1900.0%19100.0%

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 (Apr 2018)

  ISP Test count IPv6 average
1.Midcontinent Media15503.2 Mbps
2.University of Michigan8427.6 Mbps
3.Columbia University22382.1 Mbps
4.Google LLC2,042347.1 Mbps
5.Google Inc.17,529337.5 Mbps
6.Google Fiber Inc.536155.0 Mbps
7.Spirit Telecom6154.0 Mbps
8.ICS Advanced Technologies5153.9 Mbps
9.State University of New York at Buffalo185143.4 Mbps
10.Sam Houston State University5142.1 Mbps
11.Kansas Research and Education Network9131.6 Mbps
12.Custom Software Inc5130.0 Mbps
13.Mediacom Communications27126.1 Mbps
14.Road Runner201121.6 Mbps
15.University of California35119.5 Mbps
16.WiscNet8118.6 Mbps
17.Clemson University15117.1 Mbps
18.Mediacom Communications Corp1,194101.5 Mbps
19.Verizon Communications34101.0 Mbps
20.Aruba Networks3099.2 Mbps
21.Cable One4399.1 Mbps
22.FranTech Solutions4498.6 Mbps
23.Georgia Institute of Technology8396.5 Mbps
24.MCI Communications Services33394.3 Mbps
25.Spectrum14,95090.2 Mbps