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 (Oct 2020)

  ISP IPv6 tests count
1.Comcast Cable Communications, LLC6,183
2.Spectrum5,560
3.AT&T Services, Inc.3,037
4.Cellco Partnership DBA Verizon Wireless2,687
5.Hurricane Electric LLC1,700
6.Cloudflarewarp1,195
7.Cox Communications Inc.1,085
8.T-Mobile USA, Inc.575
9.Google LLC465
10.AT&T Mobility LLC437
11.Ets Telephone Company396
12.CenturyLink Communications, LLC373
13.Mediacom Communications Corp300
14.American Registry Internet Numbers228
15.Google Fiber Inc.216
16.Choopa202
17.Garrison Network Solutions LLC96
18.Cincinnati Bell Telephone Company LLC75
19.Cogent Communications66
20.Multacom Corporation63
21.Qualcomm59
22.Frontier Communications Solutions58
23.Midcontinent Communications55
24.Total Server Solutions L.L.C.50
25.Verizon Communications49

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, Oct 2020)

  ISP Unique IPv6 addresses
1.Comcast Cable Communications, LLC3,633
2.Spectrum2,789
3.Cellco Partnership DBA Verizon Wireless2,172
4.AT&T Services, Inc.1,861
5.Hurricane Electric LLC700
6.Cox Communications Inc.609
7.Cloudflarewarp572
8.T-Mobile USA, Inc.413
9.AT&T Mobility LLC308
10.Mediacom Communications Corp245
11.CenturyLink Communications, LLC220
12.Google Fiber Inc.137
13.Choopa109
14.American Registry Internet Numbers99
15.Google LLC85
16.Qualcomm50
17.Cogent Communications46
18.Midcontinent Communications39
19.Verizon Communications38
20.M247 Ltd38
21.Cincinnati Bell Telephone Company LLC38
22.Frontier Communications Solutions35
23.So-net Entertainment Corporation29
24.Google26
25.Condointernet.net26

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 (Oct 2020)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Sumofiber800.0%8100.0%
2.OzarksGo, LLC700.0%7100.0%
3.State University of New York at Buffalo1700.0%17100.0%
4.Zichao Heng500.0%5100.0%
5.DTAG European region600.0%6100.0%
6.AT&T Global Network Services1200.0%12100.0%
7.Microsoft Corp1200.0%12100.0%
8.Nynex1000.0%10100.0%
9.Unitymedia500.0%5100.0%
10.Upc Nl700.0%7100.0%
11.Reliance Jio Infocomm Limited800.0%8100.0%
12.Ncnet500.0%5100.0%
13.Level 3 Communications, Inc.1500.0%15100.0%
14.Hughes Network Systems1800.0%18100.0%
15.KabelBW500.0%5100.0%
16.Contabo GmbH2300.0%23100.0%
17.Cstnet1700.0%17100.0%
18.Fortinet Inc.700.0%7100.0%
19.Accuserv Inc500.0%5100.0%
20.Google4112.4%4097.6%
21.Southern New England Telephone Company and SNET America, Inc.2114.8%2095.2%
22.Symantec Corporation1715.9%1694.1%
23.Internet Assigned Numbers Authority4936.1%4693.9%
24.iFog GmbH1616.3%1593.8%
25.Sprint3226.3%3093.8%

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 (Oct 2020)

  ISP Test count IPv6 average
1.tzulo, inc.27304.1 Mbps
2.Google LLC465289.5 Mbps
3.Google Fiber Inc.216159.5 Mbps
4.Cincinnati Bell Telephone Company LLC75135.0 Mbps
5.Cox Communications Inc.1,085111.5 Mbps
6.Mediacom Communications Corp300111.1 Mbps
7.Spectrum5,560111.1 Mbps
8.Comcast Cable Communications, LLC6,183110.6 Mbps
9.American Registry Internet Numbers228101.9 Mbps
10.Cable One5100.1 Mbps
11.Condointernet.net3495.3 Mbps
12.Choopa20286.2 Mbps
13.Google4185.7 Mbps
14.AT&T Services, Inc.3,03785.3 Mbps
15.Cogent Communications6677.4 Mbps
16.Monkey Brains2361.0 Mbps
17.Sonoma Interconnect2060.8 Mbps
18.Hancock Rural Telephone Corp.2260.6 Mbps
19.RamNode LLC1160.5 Mbps
20.Veroxity Technology Partners558.3 Mbps
21.Midcontinent Communications5558.1 Mbps
22.CenturyLink Communications, LLC37353.6 Mbps
23.Verizon Communications4953.0 Mbps
24.Cloudflarewarp1,19549.8 Mbps
25.Amazon.com749.6 Mbps