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 (Aug 2019)

  ISP IPv6 tests count
1.Cellco Partnership DBA Verizon Wireless4,823
2.Spectrum4,712
3.Comcast Cable Communications, LLC4,550
4.Hurricane Electric LLC1,955
5.AT&T Services, Inc.1,737
6.Sprint1,286
7.Cox Communications Inc.946
8.Google LLC839
9.CenturyLink Communications, LLC712
10.T-Mobile USA, Inc.483
11.AT&T Mobility LLC353
12.Choopa243
13.Condointernet.net205
14.Mediacom Communications Corp192
15.RamNode LLC169
16.Leaseweb USA, Inc.156
17.QuadraNet Enterprises LLC149
18.Google Fiber Inc.115
19.Cloudflarewarp112
20.tzulo, inc.101
21.Linode, LLC87
22.DigitalOcean, LLC83
23.Quintex Alliance Consulting78
24.Eonix Corporation76
25.Wowrack.com71

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, Aug 2019)

  ISP Unique IPv6 addresses
1.Cellco Partnership DBA Verizon Wireless3,908
2.Comcast Cable Communications, LLC2,746
3.Spectrum2,291
4.AT&T Services, Inc.981
5.Hurricane Electric LLC718
6.Cox Communications Inc.487
7.CenturyLink Communications, LLC380
8.Sprint365
9.T-Mobile USA, Inc.343
10.AT&T Mobility LLC266
11.Google LLC166
12.Mediacom Communications Corp131
13.Choopa127
14.Google Fiber Inc.77
15.Cogent Communications42
16.Condointernet.net41
17.Quintex Alliance Consulting40
18.DigitalOcean, LLC36
19.Frontier Communications Solutions34
20.Emerald Onion31
21.Google31
22.Midcontinent Communications30
23.Chinanet30
24.IP6 SOLUTIONS d.o.o28
25.Greenlight Networks25

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 (Aug 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Arachnitec500.0%5100.0%
2.Google7000.0%70100.0%
3.Facebook, Inc.500.0%5100.0%
4.Netrouting Inc.5300.0%53100.0%
5.Facebook Inc900.0%9100.0%
6.Kvchosting.com Llc4600.0%46100.0%
7.The Linux Fix4500.0%45100.0%
8.WestHost, Inc.5400.0%54100.0%
9.NetSpeed LLC900.0%9100.0%
10.AxcelX Technologies LLC5000.0%50100.0%
11.Handy Networks3800.0%38100.0%
12.Micfo, LLC.500.0%5100.0%
13.WholeSale Internet, Inc.1400.0%14100.0%
14.Yahoo!500.0%5100.0%
15.State University of New York at Buffalo2700.0%27100.0%
16.CenturyLink Communications500.0%5100.0%
17.Perfect International, Inc2600.0%26100.0%
18.The Optimal Link Corporation3900.0%39100.0%
19.Database by Design, LLC4800.0%48100.0%
20.University of Pennsylvania700.0%7100.0%
21.FirstDigital Communications700.0%7100.0%
22.HostUS500.0%5100.0%
23.eNET Inc.3300.0%33100.0%
24.Hivelocity2500.0%25100.0%
25.H4Y Technologies LLC6900.0%69100.0%

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 (Aug 2019)

  ISP Test count IPv6 average
1.Google LLC839602.9 Mbps
2.Greenlight Networks63227.2 Mbps
3.WestHost, Inc.54211.0 Mbps
4.Microsoft Corp9193.8 Mbps
5.CenturyLink Communications5173.6 Mbps
6.Amazon Technologies Inc16124.6 Mbps
7.Verizon Communications24123.8 Mbps
8.Comcast Cable Communications, LLC4,550103.2 Mbps
9.Netrouting Inc.5393.6 Mbps
10.Sonoma Interconnect4390.3 Mbps
11.Spectrum4,71289.5 Mbps
12.Google Fiber Inc.11584.7 Mbps
13.Webpass Inc.2983.7 Mbps
14.LUMOS Networks, Inc.881.6 Mbps
15.Hancock Rural Telephone Corp.2173.2 Mbps
16.Google7072.3 Mbps
17.Cox Communications Inc.94667.1 Mbps
18.Cogent Communications6961.0 Mbps
19.AT&T Services, Inc.1,73759.2 Mbps
20.Condointernet.net20557.1 Mbps
21.Hurricane Electric LLC1,95550.5 Mbps
22.CenturyLink Communications, LLC71248.7 Mbps
23.Mediacom Communications Corp19248.6 Mbps
24.Midcontinent Communications4546.7 Mbps
25.Interserver946.5 Mbps