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 2018)

  ISP IPv6 tests count
1.Google LLC7,388
2.Spectrum7,311
3.Comcast Cable Communications6,719
4.AT&T Internet Services1,785
5.Hurricane Electric LLC1,591
6.Cellco Partnership DBA Verizon Wireless1,425
7.Cox Communications Inc.1,280
8.Hurricane Electric1,072
9.CenturyLink627
10.T-Mobile USA562
11.Sprint548
12.Mediacom Communications Corp529
13.AT&T Mobility LLC516
14.Choopa439
15.Digital Ocean252
16.QuadraNet244
17.Amazon.com215
18.Google Fiber Inc.192
19.IT7 Networks Inc180
20.Optimum Online124
21.CT Networks105
22.Leaseweb USA95
23.Linode92
24.Midcontinent Communications90
25.The Optimal Link Corporation87

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 2018)

  ISP Unique IPv6 addresses
1.Comcast Cable Communications4,099
2.Spectrum3,759
3.Cellco Partnership DBA Verizon Wireless1,079
4.AT&T Internet Services1,077
5.Hurricane Electric LLC747
6.Cox Communications Inc.707
7.Hurricane Electric458
8.T-Mobile USA424
9.AT&T Mobility LLC399
10.Sprint367
11.CenturyLink365
12.Mediacom Communications Corp354
13.Choopa233
14.Google LLC154
15.Google Fiber Inc.116
16.Digital Ocean84
17.IT7 Networks Inc82
18.CT Networks75
19.Google55
20.Linode54
21.China Unicom Network52
22.Optimum Online48
23.Midcontinent Communications46
24.Verizon Communications45
25.Webpass Inc.36

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 2018)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Kabeldeutschland500.0%5100.0%
2.University of Iowa1100.0%11100.0%
3.Facebook Ireland Ltd500.0%5100.0%
4.Yahoo!600.0%6100.0%
5.State University of New York at Buffalo1900.0%19100.0%
6.Ohio State University500.0%5100.0%
7.The Optimal Link Corporation8700.0%87100.0%
8.US Department of the Interior600.0%6100.0%
9.The Light Plant Commission of the City of Paragould800.0%8100.0%
10.WestHost6300.0%63100.0%
11.Hyperoptic Ltd700.0%7100.0%
12.3ds Communications LLC1600.0%16100.0%
13.F5 Networks1000.0%10100.0%
14.The Linux Fix1200.0%12100.0%
15.Omnificent Systems Inc800.0%8100.0%
16.Cernet2-tsinghua6600.0%6100.0%
17.Forcepoint2800.0%28100.0%
18.Hinet Twnic700.0%7100.0%
19.Limitless Mobile700.0%7100.0%
20.Interstate Telecommunications Cooperative800.0%8100.0%
21.Kit Carson Electric Cooperative1500.0%15100.0%
22.Hivelocity Ventures Corp1800.0%18100.0%
23.CloudFlare500.0%5100.0%
24.WholeSale Internet1100.0%11100.0%
25.University of Colorado Denver600.0%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 (Nov 2018)

  ISP Test count IPv6 average
1.vanoppen.biz LLC6425.0 Mbps
2.Google Inc.70406.9 Mbps
3.Google LLC7,388387.5 Mbps
4.University of Colorado Denver6218.5 Mbps
5.Pavlov Media Inc5122.6 Mbps
6.Webpass Inc.44122.3 Mbps
7.Verizon Communications73118.9 Mbps
8.Spectrum7,311100.6 Mbps
9.Comcast Cable Communications6,71980.3 Mbps
10.Sonic.net2673.8 Mbps
11.Mediacom Communications Corp52967.1 Mbps
12.Cox Communications Inc.1,28063.9 Mbps
13.University of Oregon562.2 Mbps
14.High Performance Computing1259.9 Mbps
15.Merit Network Inc.959.3 Mbps
16.American Registry Internet Numbers5657.8 Mbps
17.AT&T Services3656.2 Mbps
18.Google Fiber Inc.19255.4 Mbps
19.Micfo4254.8 Mbps
20.Google8054.2 Mbps
21.Midcontinent Communications9053.2 Mbps
22.University of Pennsylvania952.6 Mbps
23.Apple Inc.548.3 Mbps
24.AT&T Internet Services1,78546.2 Mbps
25.Optimum Online12443.5 Mbps