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 (Jan 2020)

  ISP IPv6 tests count
1.Comcast Cable Communications, LLC5,552
2.Spectrum4,659
3.Cellco Partnership DBA Verizon Wireless3,222
4.AT&T Services, Inc.2,384
5.Hurricane Electric LLC1,564
6.Google LLC1,069
7.Cox Communications Inc.863
8.Cloudflarewarp847
9.CenturyLink Communications, LLC524
10.T-Mobile USA, Inc.394
11.Sprint338
12.AT&T Mobility LLC337
13.Choopa336
14.Google Fiber Inc.245
15.Mediacom Communications Corp240
16.M247 Ltd145
17.Condointernet.net93
18.Linode, LLC93
19.RamNode LLC91
20.China Mobile communications corporation79
21.Cincinnati Bell Telephone Company LLC78
22.American Registry Internet Numbers68
23.Frontier Communications Solutions59
24.Cogent Communications58
25.Quintex Alliance Consulting55

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, Jan 2020)

  ISP Unique IPv6 addresses
1.Comcast Cable Communications, LLC3,341
2.Spectrum2,516
3.Cellco Partnership DBA Verizon Wireless2,154
4.AT&T Services, Inc.1,360
5.Hurricane Electric LLC748
6.Cox Communications Inc.542
7.Cloudflarewarp490
8.T-Mobile USA, Inc.304
9.CenturyLink Communications, LLC272
10.AT&T Mobility LLC233
11.Sprint195
12.Google LLC187
13.Mediacom Communications Corp160
14.Choopa114
15.Google Fiber Inc.109
16.Condointernet.net52
17.China Mobile communications corporation49
18.Cincinnati Bell Telephone Company LLC42
19.Frontier Communications Solutions41
20.Chinanet38
21.Cogent Communications37
22.M247 Ltd33
23.China Unicom Network30
24.Google29
25.Midcontinent Communications28

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 (Jan 2020)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Bluebird Network900.0%9100.0%
2.University of Pennsylvania600.0%6100.0%
3.anyNode1200.0%12100.0%
4.Upc Sk500.0%5100.0%
5.Kabeldeutschland900.0%9100.0%
6.Wells Fargo & Company900.0%9100.0%
7.Unite Private Networks LLC3500.0%35100.0%
8.Holyoke Gas & Electric Department1900.0%19100.0%
9.Stanford University600.0%6100.0%
10.Simply Cyber Inc700.0%7100.0%
11.Iowa Communications Network2000.0%20100.0%
12.Google3900.0%39100.0%
13.University of California, Los Angeles500.0%5100.0%
14.SnapServ Mathis800.0%8100.0%
15.Arachnitec, INC.700.0%7100.0%
16.Microsoft Corp600.0%6100.0%
17.Common Networks500.0%5100.0%
18.Gf-lax3600.0%36100.0%
19.State University of New York at Buffalo1400.0%14100.0%
20.Isomedia, Inc.1300.0%13100.0%
21.Amanah Tech Inc.600.0%6100.0%
22.Virginia Polytechnic Institute and State Univ.900.0%9100.0%
23.AT&T Services700.0%7100.0%
24.Eonix Corporation1000.0%10100.0%
25.Zichao Heng500.0%5100.0%

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 (Jan 2020)

  ISP Test count IPv6 average
1.Google LLC1,069365.3 Mbps
2.ICS Advanced Technologies13260.6 Mbps
3.Verizon Communications41255.2 Mbps
4.Bluebird Network9164.7 Mbps
5.High Performance Computing6153.7 Mbps
6.SpringNet26141.5 Mbps
7.University of Pennsylvania6108.1 Mbps
8.Comcast Cable Communications, LLC5,552105.9 Mbps
9.Unite Private Networks LLC35105.9 Mbps
10.American Registry Internet Numbers6892.0 Mbps
11.PenTeleData Inc.2387.2 Mbps
12.Spectrum4,65986.7 Mbps
13.Hurricane Electric1483.8 Mbps
14.Quintex Alliance Consulting5577.7 Mbps
15.AT&T Services, Inc.2,38468.9 Mbps
16.Webpass Inc.5067.9 Mbps
17.Mediacom Communications Corp24066.7 Mbps
18.Cox Communications Inc.86365.6 Mbps
19.Linode, LLC9365.6 Mbps
20.DigitalOcean, LLC3964.8 Mbps
21.Google Fiber Inc.24561.7 Mbps
22.Amazon.com558.0 Mbps
23.M247 Ltd14554.2 Mbps
24.Cincinnati Bell Telephone Company LLC7852.8 Mbps
25.Hurricane Electric LLC1,56449.3 Mbps