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 2019)

  ISP IPv6 tests count
1.Spectrum4,846
2.Google LLC4,563
3.Comcast Cable Communications3,816
4.Cellco Partnership DBA Verizon Wireless2,507
5.Hurricane Electric LLC1,969
6.Comcast Cable Communications, LLC1,851
7.AT&T Internet Services1,439
8.Cox Communications Inc.1,076
9.AT&T Services, Inc.702
10.CenturyLink453
11.Hurricane Electric394
12.Sprint376
13.T-Mobile USA330
14.AT&T Mobility LLC328
15.Choopa305
16.CenturyLink Communications, LLC261
17.Mediacom Communications Corp201
18.T-Mobile USA, Inc.196
19.Midcontinent Communications154
20.Google Fiber Inc.152
21.Linode106
22.Digital Ocean94
23.DigitalOcean, LLC85
24.State University of New York at Buffalo68
25.Google64

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 2019)

  ISP Unique IPv6 addresses
1.Spectrum2,317
2.Comcast Cable Communications2,206
3.Cellco Partnership DBA Verizon Wireless1,992
4.Comcast Cable Communications, LLC1,000
5.Hurricane Electric LLC700
6.AT&T Internet Services674
7.Cox Communications Inc.570
8.AT&T Services, Inc.300
9.T-Mobile USA269
10.Sprint253
11.CenturyLink241
12.AT&T Mobility LLC223
13.Hurricane Electric207
14.T-Mobile USA, Inc.163
15.CenturyLink Communications, LLC149
16.Choopa146
17.Google LLC125
18.Mediacom Communications Corp123
19.Google Fiber Inc.95
20.Midcontinent Communications73
21.Digital Ocean56
22.State University of New York at Buffalo38
23.Google37
24.M247 Ltd36
25.CT Networks35

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 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Ovh Sas800.0%8100.0%
2.So-net Entertainment Corporation1600.0%16100.0%
3.The Optimal Link Corporation3000.0%30100.0%
4.AxcelX Technologies LLC1600.0%16100.0%
5.US Dedicated2000.0%20100.0%
6.Zcorum2400.0%24100.0%
7.Internet2700.0%7100.0%
8.Everythink Innovations Limited600.0%6100.0%
9.University of Minnesota800.0%8100.0%
10.Contabo GmbH600.0%6100.0%
11.LogicWeb Inc.500.0%5100.0%
12.Facebook Inc1100.0%11100.0%
13.AT&T Services2300.0%23100.0%
14.Nato Research Ltd.500.0%5100.0%
15.Hinet Twnic600.0%6100.0%
16.Starry2900.0%29100.0%
17.H4Y Technologies LLC3600.0%36100.0%
18.Hughes Network Systems1000.0%10100.0%
19.WestHost700.0%7100.0%
20.Psychz Networks600.0%6100.0%
21.Portage Public Schools600.0%6100.0%
22.Database by Design, LLC700.0%7100.0%
23.Eonix Corporation1500.0%15100.0%
24.WholeSale Internet, Inc.500.0%5100.0%
25.QuadraNet Enterprises LLC2600.0%26100.0%

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 2019)

  ISP Test count IPv6 average
1.State University of New York at Buffalo68496.4 Mbps
2.Google LLC4,563373.0 Mbps
3.Google64102.5 Mbps
4.Spectrum4,846102.2 Mbps
5.Comcast Cable Communications3,81697.8 Mbps
6.Cox Communications Inc.1,07694.0 Mbps
7.Apple Inc.890.2 Mbps
8.Amazon.com4789.4 Mbps
9.WiscNet1189.0 Mbps
10.Verizon Communications5788.7 Mbps
11.Webpass Inc.3487.6 Mbps
12.Mediacom Communications Corp20183.2 Mbps
13.Comcast Cable Communications, LLC1,85182.9 Mbps
14.Linode10681.7 Mbps
15.AT&T Internet Services1,43979.8 Mbps
16.University of Minnesota874.3 Mbps
17.Google Fiber Inc.15273.8 Mbps
18.DigitalOcean, LLC8570.1 Mbps
19.University of Pennsylvania1569.6 Mbps
20.Upc Pl968.2 Mbps
21.CenturyLink Communications, LLC26167.3 Mbps
22.Midcontinent Communications15466.9 Mbps
23.AT&T Services, Inc.70266.5 Mbps
24.CenturyLink45363.7 Mbps
25.Amazon Technologies Inc2163.0 Mbps