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 (Jul 2020)

  ISP IPv6 tests count
1.Comcast Cable Communications, LLC7,432
2.Spectrum6,007
3.AT&T Services, Inc.3,110
4.Cellco Partnership DBA Verizon Wireless2,604
5.Hurricane Electric LLC2,386
6.Cox Communications Inc.1,428
7.Cloudflarewarp826
8.Google LLC612
9.CenturyLink Communications, LLC597
10.T-Mobile USA, Inc.528
11.AT&T Mobility LLC442
12.Mediacom Communications Corp295
13.Sprint277
14.Google Fiber Inc.270
15.Choopa265
16.Frontier Communications Solutions152
17.NetSource Communications147
18.American Registry Internet Numbers146
19.Condointernet.net114
20.Internet Assigned Numbers Authority111
21.Symantec Corporation104
22.M247 Ltd88
23.Sumofiber79
24.Amazon Technologies Inc77
25.Multacom Corporation76

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, Jul 2020)

  ISP Unique IPv6 addresses
1.Comcast Cable Communications, LLC3,918
2.Spectrum2,985
3.Cellco Partnership DBA Verizon Wireless1,848
4.AT&T Services, Inc.1,807
5.Hurricane Electric LLC770
6.Cox Communications Inc.747
7.Cloudflarewarp455
8.T-Mobile USA, Inc.358
9.CenturyLink Communications, LLC304
10.AT&T Mobility LLC294
11.Mediacom Communications Corp193
12.Google Fiber Inc.128
13.Sprint99
14.Choopa87
15.Google LLC65
16.Condointernet.net60
17.Chinanet50
18.American Registry Internet Numbers48
19.M247 Ltd45
20.Midcontinent Communications45
21.Verizon Communications39
22.Quintex Alliance Consulting34
23.Frontier Communications Solutions33
24.Webpass Inc.32
25.Cogent Communications32

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 (Jul 2020)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.University of California, San Diego500.0%5100.0%
2.Hurricane Electric900.0%9100.0%
3.Serveurcom SRL500.0%5100.0%
4.Microsoft Corp1600.0%16100.0%
5.Nynex1300.0%13100.0%
6.iFog GmbH1400.0%14100.0%
7.1&1 Internet Inc. (11INT1000.0%10100.0%
8.General Communication, Inc.800.0%8100.0%
9.Hancock Rural Telephone Corp.700.0%7100.0%
10.Amazon.com, Inc.1300.0%13100.0%
11.Aureon Network Services900.0%9100.0%
12.Ability Business700.0%7100.0%
13.Wowrack.com1500.0%15100.0%
14.Cct Llc700.0%7100.0%
15.Ovh Sas1300.0%13100.0%
16.Wells Fargo & Company600.0%6100.0%
17.Qihoo1000.0%10100.0%
18.Internet Assigned Numbers Authority11100.0%111100.0%
19.xTom.com1100.0%11100.0%
20.Microsoft Corporation500.0%5100.0%
21.ProXad network / Free500.0%5100.0%
22.Sauk Valley Community College500.0%5100.0%
23.Greenlight Networks900.0%9100.0%
24.Lightspeed Communications700.0%7100.0%
25.Central Virginia Services, INC800.0%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 (Jul 2020)

  ISP Test count IPv6 average
1.Sumofiber79185.8 Mbps
2.Lightspeed Communications7182.6 Mbps
3.Webpass Inc.52160.3 Mbps
4.Cogent Communications56144.0 Mbps
5.Cox Communications Inc.1,428128.9 Mbps
6.Linode, LLC30126.6 Mbps
7.Google Fiber Inc.270126.4 Mbps
8.Condointernet.net114124.8 Mbps
9.TeraSwitch Networks Inc.8116.7 Mbps
10.PenTeleData Inc.11116.6 Mbps
11.Cincinnati Bell Telephone Company LLC26116.3 Mbps
12.CenturyLink Communications, LLC597107.9 Mbps
13.Spectrum6,007105.2 Mbps
14.Comcast Cable Communications, LLC7,432102.4 Mbps
15.Monkey Brains48100.3 Mbps
16.Choopa26598.3 Mbps
17.ANEXIA Internetdienstleistungs GmbH593.8 Mbps
18.American Registry Internet Numbers14688.9 Mbps
19.Mediacom Communications Corp29588.7 Mbps
20.Bulloch County Rural Telephone Cooperative, Inc.587.7 Mbps
21.Mesh.Net885.0 Mbps
22.Verizon Communications7484.6 Mbps
23.Clouds Network Limited1278.4 Mbps
24.Midcontinent Communications7169.0 Mbps
25.AT&T Services, Inc.3,11067.6 Mbps