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 2019)

  ISP IPv6 tests count
1.Cellco Partnership DBA Verizon Wireless5,159
2.Spectrum4,854
3.Comcast Cable Communications, LLC4,851
4.Hurricane Electric LLC1,977
5.AT&T Services, Inc.1,742
6.Sprint1,188
7.Cox Communications Inc.1,057
8.Google LLC799
9.T-Mobile USA, Inc.617
10.CenturyLink Communications, LLC413
11.Mediacom Communications Corp357
12.AT&T Mobility LLC344
13.Choopa324
14.Verizon Communications218
15.DigitalOcean, LLC157
16.Cogent Communications143
17.Leaseweb USA, Inc.140
18.RamNode LLC140
19.QuadraNet Enterprises LLC125
20.Google Fiber Inc.105
21.Eonix Corporation87
22.Quintex Alliance Consulting86
23.InfoWest84
24.Linode78
25.tzulo, inc.75

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 2019)

  ISP Unique IPv6 addresses
1.Cellco Partnership DBA Verizon Wireless3,636
2.Comcast Cable Communications, LLC2,899
3.Spectrum2,578
4.AT&T Services, Inc.986
5.Hurricane Electric LLC763
6.Cox Communications Inc.595
7.T-Mobile USA, Inc.424
8.Sprint385
9.AT&T Mobility LLC247
10.CenturyLink Communications, LLC226
11.Mediacom Communications Corp171
12.Choopa139
13.Google LLC134
14.Google Fiber Inc.66
15.DigitalOcean, LLC44
16.Chinanet42
17.Quintex Alliance Consulting41
18.Cogent Communications41
19.Midcontinent Communications40
20.Verizon Communications40
21.Webpass Inc.34
22.Emerald Onion33
23.Condointernet.net30
24.Google29
25.Cincinnati Bell Telephone Company LLC23

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 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.H4Y Technologies LLC6300.0%63100.0%
2.Zdm Network Solutions Llc900.0%9100.0%
3.State University of New York at Buffalo2000.0%20100.0%
4.National Science Foundation1000.0%10100.0%
5.Southern New England Telephone Company and SNET America, Inc.600.0%6100.0%
6.Database by Design, LLC5500.0%55100.0%
7.Nynex700.0%7100.0%
8.Handy Networks3400.0%34100.0%
9.eNET Inc.4200.0%42100.0%
10.University of Pennsylvania500.0%5100.0%
11.Internet21300.0%13100.0%
12.Cenic700.0%7100.0%
13.VMHaus Limited900.0%9100.0%
14.US Dedicated5600.0%56100.0%
15.WholeSale Internet, Inc.600.0%6100.0%
16.Hivelocity4800.0%48100.0%
17.Netrouting Inc.4900.0%49100.0%
18.High Performance Computing700.0%7100.0%
19.Kvchosting.com Llc4000.0%40100.0%
20.The Optimal Link Corporation5300.0%53100.0%
21.National Aeronautics and Space Administration500.0%5100.0%
22.The Linux Fix5700.0%57100.0%
23.KabelBW1800.0%18100.0%
24.Ovh Sas800.0%8100.0%
25.Greenlight Networks2300.0%23100.0%

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 2019)

  ISP Test count IPv6 average
1.Google LLC799479.9 Mbps
2.American Registry Internet Numbers16227.5 Mbps
3.Cogent Communications143108.1 Mbps
4.Choopa324102.1 Mbps
5.Spectrum4,854100.9 Mbps
6.Comcast Cable Communications, LLC4,85191.4 Mbps
7.Choopa, LLC1584.2 Mbps
8.Dovetel Communications, Llc.673.3 Mbps
9.Cox Communications Inc.1,05769.6 Mbps
10.Verizon Communications21864.1 Mbps
11.Linode7859.7 Mbps
12.Sonoma Interconnect1859.2 Mbps
13.AT&T Services, Inc.1,74258.4 Mbps
14.Google Fiber Inc.10557.9 Mbps
15.Cincinnati Bell Telephone Company LLC2956.5 Mbps
16.Mediacom Communications Corp35750.6 Mbps
17.Midcontinent Communications6349.2 Mbps
18.Zdm Network Solutions Llc948.0 Mbps
19.Time Warner Cable Internet LLC547.7 Mbps
20.Lightspeed Communications1145.2 Mbps
21.Hughes Network Systems1245.1 Mbps
22.CenturyLink Communications, LLC41344.4 Mbps
23.Netrouting Inc.4942.9 Mbps
24.Hurricane Electric LLC1,97740.0 Mbps
25.Webpass Inc.6838.7 Mbps