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 (Mar 2017)

  ISP IPv6 tests count
1.Comcast Cable Communications26,249
2.Time Warner Cable Internet LLC13,508
3.Google Inc.13,205
4.Cellco Partnership DBA Verizon Wireless9,771
5.Hurricane Electric7,510
6.Cox Communications Inc.6,151
7.AT&T Internet Services4,876
8.T-Mobile USA2,321
9.Qwest Communications Company1,989
10.Charter Communications1,910
11.AT&T Mobility LLC1,556
12.Mediacom Communications Corp1,097
13.American Registry Internet Numbers666
14.Choopa558
15.Webpass Inc.466
16.Sprint450
17.Google Fiber Inc.445
18.Digital Ocean395
19.Road Runner285
20.CenturyTel Internet Holdings241
21.Linode225
22.Internet Assigned Numbers Authority200
23.QuadraNet196
24.RamNode LLC187
25.Midcontinent Communications183

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, Mar 2017)

  ISP Unique IPv6 addresses
1.Comcast Cable Communications14,382
2.Cellco Partnership DBA Verizon Wireless7,421
3.Time Warner Cable Internet LLC7,289
4.Hurricane Electric3,610
5.Cox Communications Inc.3,125
6.AT&T Internet Services3,024
7.T-Mobile USA1,724
8.AT&T Mobility LLC1,032
9.Qwest Communications Company998
10.Charter Communications893
11.Mediacom Communications Corp608
12.Sprint364
13.American Registry Internet Numbers301
14.Webpass Inc.296
15.Google Fiber Inc.292
16.Google Inc.241
17.Choopa184
18.Road Runner165
19.Internet Assigned Numbers Authority150
20.Digital Ocean147
21.Microsoft Corp129
22.Linode122
23.Google Incorporated117
24.Arris Group116
25.Midcontinent Communications113

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 (Mar 2017)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.University of Iowa800.0%8100.0%
2.Sauk Valley Community College600.0%6100.0%
3.Team Cymru Inc.700.0%7100.0%
4.New Dream Network900.0%9100.0%
5.QuickPacket2500.0%25100.0%
6.Nanog900.0%9100.0%
7.Quantcast Corporation1700.0%17100.0%
8.Hosting Solution Ltd.3200.0%32100.0%
9.Bt Uk800.0%8100.0%
10.Hudson Valley Datanet900.0%9100.0%
11.Adelphi University700.0%7100.0%
12.Accenture LLP600.0%6100.0%
13.Uk-microsoft-msit500.0%5100.0%
14.RIPE Network Coordination Centre700.0%7100.0%
15.DNA Oyj500.0%5100.0%
16.Florida High Speed Internet800.0%8100.0%
17.Shentel Communications1100.0%11100.0%
18.Epic Systems Corporation700.0%7100.0%
19.Wells Fargo & Company3300.0%33100.0%
20.Rogers Communications Canada Inc.3000.0%30100.0%
21.WZ Communications Inc.500.0%5100.0%
22.Cogeco Cable Inc.1600.0%16100.0%
23.Yale University600.0%6100.0%
24.Cascadelink Inc900.0%9100.0%
25.FirstDigital Communications600.0%6100.0%

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 (Mar 2017)

  ISP Test count IPv6 average
1.Google Inc.13,205306.3 Mbps
2.Apple Inc.35245.0 Mbps
3.AT&T Services98171.0 Mbps
4.General Communication52143.8 Mbps
5.Netflix Inc14143.1 Mbps
6.Google Incorporated143119.2 Mbps
7.QuickPacket25114.1 Mbps
8.Adelphi University7112.0 Mbps
9.State University of New York at Buffalo134111.9 Mbps
10.Guadalupe Valley Telephone Cooperative10108.8 Mbps
11.C7 Data Centers7102.2 Mbps
12.Cenic57100.7 Mbps
13.Sixxs-uschi02-tunnels592.3 Mbps
14.Google Fiber Inc.44590.5 Mbps
15.Dynatrace685.5 Mbps
16.Cascadelink Inc980.7 Mbps
17.tw telecom holdings1180.5 Mbps
18.University of Iowa879.1 Mbps
19.Amazon.com10372.9 Mbps
20.Indiana University1665.4 Mbps
21.Condointernet.net13664.2 Mbps
22.The Hinton CATV Company1962.9 Mbps
23.Georgia Institute of Technology1159.1 Mbps
24.University of California at Berkeley3958.0 Mbps
25.Aerohive Networks1457.8 Mbps