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 (Jun 2019)

  ISP IPv6 tests count
1.Comcast Cable Communications, LLC5,351
2.Spectrum4,339
3.Cellco Partnership DBA Verizon Wireless4,073
4.Hurricane Electric LLC1,907
5.Sprint1,829
6.AT&T Services, Inc.1,443
7.Cox Communications Inc.955
8.Google LLC686
9.T-Mobile USA, Inc.536
10.Choopa382
11.AT&T Mobility LLC340
12.CenturyLink Communications, LLC294
13.DigitalOcean, LLC203
14.Mediacom Communications Corp161
15.RamNode LLC160
16.Leaseweb USA, Inc.131
17.Google Fiber Inc.118
18.Qualcomm116
19.tzulo, inc.114
20.QuadraNet Enterprises LLC111
21.Frontier Communications Solutions94
22.Cogent Communications88
23.H4Y Technologies LLC86
24.Midcontinent Communications68
25.Linode66

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, Jun 2019)

  ISP Unique IPv6 addresses
1.Cellco Partnership DBA Verizon Wireless3,216
2.Comcast Cable Communications, LLC3,187
3.Spectrum2,369
4.AT&T Services, Inc.803
5.Hurricane Electric LLC761
6.Cox Communications Inc.584
7.Sprint387
8.T-Mobile USA, Inc.385
9.AT&T Mobility LLC255
10.CenturyLink Communications, LLC210
11.Choopa167
12.Google LLC147
13.DigitalOcean, LLC125
14.Mediacom Communications Corp102
15.Google Fiber Inc.85
16.Qualcomm74
17.Midcontinent Communications46
18.Cincinnati Bell Telephone Company LLC41
19.Cogent Communications38
20.Frontier Communications Solutions34
21.Quintex Alliance Consulting34
22.RamNode LLC33
23.Linode, LLC28
24.Verizon Communications27
25.Sonoma Interconnect27

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 (Jun 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.eNET Inc.3800.0%38100.0%
2.CarolinaConnect Cooperative1900.0%19100.0%
3.Central Virginia Services, INC2000.0%20100.0%
4.Ken-Tenn Wireless LLC600.0%6100.0%
5.Eonix Corporation3900.0%39100.0%
6.WholeSale Internet, Inc.3700.0%37100.0%
7.WestHost, Inc.5500.0%55100.0%
8.Contina600.0%6100.0%
9.The Light Plant Commission of the City of Paragould1400.0%14100.0%
10.EPB Fiber Optics800.0%8100.0%
11.H4Y Technologies LLC8600.0%86100.0%
12.University System of New Hampshire1800.0%18100.0%
13.State University of New York at Buffalo1900.0%19100.0%
14.Handy Networks3700.0%37100.0%
15.Database by Design, LLC4100.0%41100.0%
16.Internet21300.0%13100.0%
17.VMHaus Limited2300.0%23100.0%
18.Liuxyon Car Rental Service Co., Ltd.1700.0%17100.0%
19.Hughes Network Systems2000.0%20100.0%
20.Kvchosting.com Llc4100.0%41100.0%
21.AxcelX Technologies LLC5700.0%57100.0%
22.The Linux Fix5100.0%51100.0%
23.HostUS500.0%5100.0%
24.TELUS Communications Inc1300.0%13100.0%
25.COPEL Telecomunicações S.A.900.0%9100.0%

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 (Jun 2019)

  ISP Test count IPv6 average
1.Google LLC686403.4 Mbps
2.University of Tennessee at Chattanooga22240.1 Mbps
3.Hostwinds LLC20123.6 Mbps
4.Mediacom Communications Corp161114.5 Mbps
5.Spectrum4,339100.4 Mbps
6.Comcast Cable Communications, LLC5,35191.9 Mbps
7.ICS Advanced Technologies1390.9 Mbps
8.University System of New Hampshire1886.9 Mbps
9.Microsoft Corp1086.2 Mbps
10.Cloudflarewarp982.9 Mbps
11.Hivelocity6074.2 Mbps
12.Sonoma Interconnect6472.3 Mbps
13.EPB Fiber Optics871.0 Mbps
14.Cox Communications Inc.95564.5 Mbps
15.Webpass Inc.1363.9 Mbps
16.Google Fiber Inc.11862.4 Mbps
17.CenturyLink Communications, LLC29458.7 Mbps
18.AT&T Services, Inc.1,44356.8 Mbps
19.SoftLayer1151.7 Mbps
20.American Registry Internet Numbers2851.7 Mbps
21.Cogent Communications8850.2 Mbps
22.Time Warner Cable Internet LLC1649.9 Mbps
23.Hurricane Electric LLC1,90749.8 Mbps
24.Cincinnati Bell Telephone Company LLC6149.1 Mbps
25.Netrouting Inc.6143.5 Mbps