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 2019)

  ISP IPv6 tests count
1.Comcast Cable Communications31,917
2.Google LLC7,687
3.Spectrum6,984
4.AT&T Internet Services2,449
5.Cellco Partnership DBA Verizon Wireless2,307
6.Hurricane Electric LLC1,652
7.Cox Communications Inc.1,215
8.Hurricane Electric842
9.AT&T Mobility LLC763
10.CenturyLink644
11.T-Mobile USA608
12.Choopa546
13.Mediacom Communications Corp447
14.Sprint413
15.Google Fiber Inc.290
16.QuadraNet199
17.Linode167
18.RamNode LLC162
19.Facebook Inc148
20.Digital Ocean145
21.Amazon.com135
22.Leaseweb USA106
23.Quintex Alliance Consulting103
24.Psychz Networks99
25.IT7 Networks Inc96

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 2019)

  ISP Unique IPv6 addresses
1.Comcast Cable Communications4,152
2.Spectrum3,348
3.Cellco Partnership DBA Verizon Wireless1,884
4.AT&T Internet Services1,371
5.Hurricane Electric LLC827
6.Cox Communications Inc.725
7.AT&T Mobility LLC499
8.T-Mobile USA414
9.Hurricane Electric414
10.CenturyLink381
11.Sprint361
12.Mediacom Communications Corp299
13.Choopa263
14.Google Fiber Inc.143
15.Google LLC98
16.Digital Ocean85
17.Facebook Inc63
18.American Registry Internet Numbers58
19.Linode56
20.RamNode LLC47
21.Internet Assigned Numbers Authority46
22.CT Networks39
23.Verizon Communications38
24.Leaseweb USA36
25.IT7 Networks Inc34

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 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.T-2 d.o.o800.0%8100.0%
2.DFW Datacenter1200.0%12100.0%
3.Hinet Twnic2700.0%27100.0%
4.The Optimal Link Corporation7800.0%78100.0%
5.H4Y Technologies LLC7100.0%71100.0%
6.WholeSale Internet1600.0%16100.0%
7.Google2100.0%21100.0%
8.State University of New York at Buffalo3600.0%36100.0%
9.Pilot Fiber700.0%7100.0%
10.Hivelocity Ventures Corp1900.0%19100.0%
11.DCSTech700.0%7100.0%
12.Hughes Network Systems2600.0%26100.0%
13.Vivid Hosting2300.0%23100.0%
14.Facebook Ireland Ltd1200.0%12100.0%
15.Limitless Mobile3700.0%37100.0%
16.University at Albany800.0%8100.0%
17.Asociacion De Servicio De Internet S. De RL600.0%6100.0%
18.Solantic Corporation800.0%8100.0%
19.Interstar Network Services1700.0%17100.0%
20.Electro Nebula LLC1300.0%13100.0%
21.WestHost6500.0%65100.0%
22.Facebook Inc14842.7%14497.3%
23.Nynex3313.0%3297.0%
24.Comcast Cable Communications31,9171,0123.2%30,90596.8%
25.Leaseweb USA10643.8%10296.2%

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 2019)

  ISP Test count IPv6 average
1.Google LLC7,687421.9 Mbps
2.Microsoft Corp8178.7 Mbps
3.DCSTech7166.6 Mbps
4.High Performance Computing6151.8 Mbps
5.Facebook Inc148128.8 Mbps
6.Upc Pl42112.6 Mbps
7.State University of New York at Buffalo3689.1 Mbps
8.Apple Inc.1985.2 Mbps
9.Zenlayer Inc1884.1 Mbps
10.Webpass Inc.4374.1 Mbps
11.Greenlight Networks3764.8 Mbps
12.Spectrum6,98464.4 Mbps
13.AT&T Internet Services2,44961.4 Mbps
14.Comcast Cable Communications31,91760.9 Mbps
15.Cox Communications Inc.1,21560.4 Mbps
16.Linode16753.1 Mbps
17.Garrison Network Solutions LLC1053.0 Mbps
18.HugeServer Networks1052.6 Mbps
19.Mediacom Communications Corp44751.8 Mbps
20.tzulo7251.6 Mbps
21.Hurricane Electric84244.4 Mbps
22.Cisco Systems2242.2 Mbps
23.Digital Ocean14541.0 Mbps
24.Verizon Communications5540.5 Mbps
25.Optimum Online6540.2 Mbps