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 2019)

  ISP IPv6 tests count
1.Spectrum4,952
2.Comcast Cable Communications, LLC4,917
3.Cellco Partnership DBA Verizon Wireless3,212
4.Hurricane Electric LLC1,786
5.AT&T Services, Inc.1,459
6.Cloudflarewarp1,092
7.M247 Ltd813
8.Cox Communications Inc.781
9.Google LLC769
10.Sprint691
11.Total Server Solutions L.L.C.487
12.Choopa485
13.CenturyLink Communications, LLC453
14.T-Mobile USA, Inc.437
15.QuadraNet Enterprises LLC404
16.AT&T Mobility LLC332
17.Mediacom Communications Corp274
18.tzulo, inc.205
19.M247 Ltd Cgnt199
20.Contina168
21.Leaseweb USA, Inc.158
22.WestHost, Inc.153
23.Google Fiber Inc.130
24.Frontier Communications Solutions129
25.DigitalOcean, LLC108

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 2019)

  ISP Unique IPv6 addresses
1.Cellco Partnership DBA Verizon Wireless2,813
2.Comcast Cable Communications, LLC2,801
3.Spectrum2,320
4.AT&T Services, Inc.855
5.Hurricane Electric LLC626
6.Cox Communications Inc.463
7.Cloudflarewarp460
8.T-Mobile USA, Inc.343
9.AT&T Mobility LLC234
10.CenturyLink Communications, LLC227
11.Mediacom Communications Corp168
12.Sprint156
13.Choopa125
14.Google LLC121
15.Google Fiber Inc.85
16.DigitalOcean, LLC43
17.M247 Ltd34
18.Frontier Communications Solutions32
19.Emerald Onion32
20.Linode30
21.Webpass Inc.30
22.Qualcomm29
23.Condointernet.net29
24.Quintex Alliance Consulting27
25.Linode, LLC24

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 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.DataShack, LC1000.0%10100.0%
2.Wells Fargo & Company1300.0%13100.0%
3.Bharti Airtel2000.0%20100.0%
4.Tobias Maedel1200.0%12100.0%
5.Enzu Inc1500.0%15100.0%
6.Perfect International, Inc900.0%9100.0%
7.Handy Networks5400.0%54100.0%
8.Starry600.0%6100.0%
9.Hancock Rural Telephone Corp.800.0%8100.0%
10.Hughes Network Systems600.0%6100.0%
11.University of Wisconsin Madison600.0%6100.0%
12.InterStar Network Services, Inc.2200.0%22100.0%
13.StarHub-Ltd-NGNBN-Services600.0%6100.0%
14.Google3300.0%33100.0%
15.Southern New England Telephone Company and SNET America, Inc.900.0%9100.0%
16.Wildcard Corp.600.0%6100.0%
17.Eonix Corporation4700.0%47100.0%
18.University of California, San Diego2000.0%20100.0%
19.AxcelX Technologies LLC4400.0%44100.0%
20.The Optimal Link Corporation4900.0%49100.0%
21.Gf-lax1200.0%12100.0%
22.State University of New York at Buffalo5200.0%52100.0%
23.Database by Design, LLC6200.0%62100.0%
24.The Linux Fix4600.0%46100.0%
25.Joe's Datacenter, LLC5100.0%51100.0%

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 (Oct 2019)

  ISP Test count IPv6 average
1.Google LLC769468.3 Mbps
2.Microsoft Corp13448.3 Mbps
3.SoftLayer5170.3 Mbps
4.University of Wisconsin Madison6152.8 Mbps
5.Greenlight Networks29140.3 Mbps
6.Mediacom Communications Corp274114.1 Mbps
7.Verizon Communications24113.9 Mbps
8.Comcast Cable Communications, LLC4,917100.6 Mbps
9.Hurricane Electric1198.4 Mbps
10.Spectrum4,95297.7 Mbps
11.State University of New York at Buffalo5291.2 Mbps
12.Cincinnati Bell Telephone Company LLC2985.3 Mbps
13.Google Fiber Inc.13083.8 Mbps
14.Cox Communications Inc.78172.6 Mbps
15.AT&T Services, Inc.1,45964.9 Mbps
16.Linode3862.5 Mbps
17.MCI Communications Services, Inc. d/b/a Verizon Business1853.3 Mbps
18.Google3349.3 Mbps
19.CenturyLink Communications, LLC45346.6 Mbps
20.Condointernet.net5444.2 Mbps
21.Virginia Polytechnic Institute and State Univ.1340.1 Mbps
22.Cloudflarewarp1,09234.0 Mbps
23.T-Mobile USA, Inc.43733.2 Mbps
24.Cisco Systems1432.8 Mbps
25.Hurricane Electric LLC1,78631.8 Mbps