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 (Sep 2018)

  ISP IPv6 tests count
1.Comcast Cable Communications7,609
2.Spectrum7,608
3.Google LLC7,041
4.Cellco Partnership DBA Verizon Wireless2,614
5.AT&T Internet Services2,134
6.Hurricane Electric LLC1,828
7.Cox Communications Inc.1,750
8.Hurricane Electric931
9.CenturyLink689
10.Choopa577
11.AT&T Mobility LLC504
12.T-Mobile USA473
13.Sprint408
14.Mediacom Communications Corp390
15.Digital Ocean297
16.IT7 Networks Inc227
17.Google Fiber Inc.150
18.Google Inc.120
19.QuadraNet102
20.AT&T Services97
21.CT Networks83
22.Linode80
23.China Mobile66
24.Midcontinent Communications60
25.Multacom Corporation57

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, Sep 2018)

  ISP Unique IPv6 addresses
1.Comcast Cable Communications4,426
2.Spectrum3,912
3.Cellco Partnership DBA Verizon Wireless1,716
4.AT&T Internet Services1,180
5.Cox Communications Inc.923
6.Hurricane Electric LLC896
7.Hurricane Electric429
8.T-Mobile USA369
9.AT&T Mobility LLC365
10.CenturyLink360
11.Sprint354
12.Choopa246
13.Mediacom Communications Corp233
14.Google LLC126
15.Digital Ocean113
16.Google Fiber Inc.110
17.AT&T Services83
18.IT7 Networks Inc81
19.China Mobile48
20.CT Networks47
21.Linode43
22.Condointernet.net31
23.QuadraNet30
24.Webpass Inc.30
25.M247 Ltd29

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 (Sep 2018)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Southern New England Telephone Company and SNET America800.0%8100.0%
2.University of Pennsylvania600.0%6100.0%
3.CarolinaConnect Cooperative700.0%7100.0%
4.Midcontinent Media600.0%6100.0%
5.Cenic1900.0%19100.0%
6.Lawton Information Services2700.0%27100.0%
7.LinkedIn Corporation700.0%7100.0%
8.Schlund500.0%5100.0%
9.University System of New Hampshire500.0%5100.0%
10.OARnet900.0%9100.0%
11.Fibertech Networks500.0%5100.0%
12.Amazon Technologies Inc600.0%6100.0%
13.WiscNet1200.0%12100.0%
14.Apple Inc.700.0%7100.0%
15.Cernet2-tsinghua6800.0%8100.0%
16.Daktronics1200.0%12100.0%
17.LongTail Ad Solutions1300.0%13100.0%
18.Internet21000.0%10100.0%
19.Nynex5012.0%4998.0%
20.Hughes Network Systems4212.4%4197.6%
21.Hinet Twnic3113.2%3096.8%
22.State University of New York at Buffalo2114.8%2095.2%
23.AT&T Mobility LLC504295.8%47594.2%
24.Netrouting Inc.1715.9%1694.1%
25.Forcepoint1616.3%1593.8%

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 (Sep 2018)

  ISP Test count IPv6 average
1.University of Minnesota6384.8 Mbps
2.Verizon Online LLC30367.3 Mbps
3.Google LLC7,041343.5 Mbps
4.Google Incorporated26319.7 Mbps
5.LongTail Ad Solutions13316.2 Mbps
6.WhyFly6185.3 Mbps
7.Vivint Wireless5136.1 Mbps
8.Amazon.com18124.1 Mbps
9.Spectrum7,608104.7 Mbps
10.Comcast Cable Communications7,60997.9 Mbps
11.Linode8094.7 Mbps
12.US Dedicated586.4 Mbps
13.Choopa57780.9 Mbps
14.Midcontinent Media673.2 Mbps
15.Mediacom Communications Corp39072.9 Mbps
16.Micfo4372.7 Mbps
17.Cox Communications Inc.1,75067.2 Mbps
18.QuadraNet10265.8 Mbps
19.Google Fiber Inc.15063.8 Mbps
20.Upc Pl961.4 Mbps
21.Quintex Alliance Consulting1954.3 Mbps
22.Kwm551.2 Mbps
23.CenturyLink68950.6 Mbps
24.Midcontinent Communications6050.4 Mbps
25.Hudson Valley Datanet3245.4 Mbps