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 2020)

  ISP IPv6 tests count
1.Comcast Cable Communications, LLC6,893
2.Spectrum6,400
3.AT&T Services, Inc.3,280
4.Cellco Partnership DBA Verizon Wireless3,055
5.Hurricane Electric LLC2,304
6.Cox Communications Inc.1,308
7.Cloudflarewarp1,098
8.Google LLC651
9.T-Mobile USA, Inc.637
10.CenturyLink Communications, LLC626
11.Google Fiber Inc.369
12.AT&T Mobility LLC354
13.Mediacom Communications Corp342
14.American Registry Internet Numbers298
15.Choopa204
16.DigitalOcean, LLC162
17.Cogent Communications139
18.Sprint133
19.Verizon Communications119
20.SureWest Kansas Operations, LLC103
21.Frontier Communications Solutions98
22.Multacom Corporation97
23.M247 Ltd94
24.Midcontinent Communications77
25.Condointernet.net73

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 2020)

  ISP Unique IPv6 addresses
1.Comcast Cable Communications, LLC4,038
2.Spectrum3,195
3.Cellco Partnership DBA Verizon Wireless2,287
4.AT&T Services, Inc.2,042
5.Hurricane Electric LLC927
6.Cox Communications Inc.755
7.Cloudflarewarp603
8.T-Mobile USA, Inc.377
9.CenturyLink Communications, LLC332
10.Mediacom Communications Corp260
11.AT&T Mobility LLC250
12.Google Fiber Inc.206
13.American Registry Internet Numbers132
14.Choopa100
15.Google LLC73
16.Verizon Communications72
17.Sprint63
18.M247 Ltd53
19.Cogent Communications51
20.Cincinnati Bell Telephone Company LLC39
21.Chinanet39
22.DigitalOcean, LLC34
23.Condointernet.net33
24.Frontier Communications Solutions32
25.Midcontinent Communications31

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 2020)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Hancock Rural Telephone Corp.1000.0%10100.0%
2.NetSource Communications4800.0%48100.0%
3.Nynex700.0%7100.0%
4.TELUS Communications Inc2000.0%20100.0%
5.Wells Fargo & Company900.0%9100.0%
6.Sumofiber500.0%5100.0%
7.AT&T Global Network Services600.0%6100.0%
8.GTHost1700.0%17100.0%
9.Hetzner1000.0%10100.0%
10.Motherboard Express Company500.0%5100.0%
11.Arachnitec, INC.900.0%9100.0%
12.NightRise LLC1600.0%16100.0%
13.Easton Utilities Commission1400.0%14100.0%
14.Zayo Bandwidth700.0%7100.0%
15.Tierzero500.0%5100.0%
16.Sprious LLC700.0%7100.0%
17.University of California, San Diego600.0%6100.0%
18.Dot Enterprise Co.500.0%5100.0%
19.Facebook, Inc.1000.0%10100.0%
20.Microsoft Corp600.0%6100.0%
21.Gf-lax1400.0%14100.0%
22.Centrilogic, Inc.500.0%5100.0%
23.Sprint13343.0%12997.0%
24.Google3013.3%2996.7%
25.OzarksGo, LLC2514.0%2496.0%

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 (Sep 2020)

  ISP Test count IPv6 average
1.Amazon Technologies Inc20455.0 Mbps
2.State University of New York at Buffalo11384.1 Mbps
3.Verizon Communications119219.9 Mbps
4.Google Fiber Inc.369144.8 Mbps
5.Twin Lakes Telephone Cooperative Corporation8132.1 Mbps
6.Condointernet.net73130.1 Mbps
7.Total Server Solutions L.L.C.40128.0 Mbps
8.Comcast Cable Communications, LLC6,893116.8 Mbps
9.Spectrum6,400113.3 Mbps
10.Mediacom Communications Corp342107.0 Mbps
11.Centrilogic, Inc.5104.6 Mbps
12.Cox Communications Inc.1,308103.2 Mbps
13.tzulo, inc.3799.1 Mbps
14.Monkey Brains1684.8 Mbps
15.Cogent Communications13982.4 Mbps
16.Linode, LLC3680.8 Mbps
17.AT&T Services, Inc.3,28073.0 Mbps
18.WideOpenWest Finance LLC2770.5 Mbps
19.EPB Fiber Optics767.9 Mbps
20.Amazon.com1967.8 Mbps
21.Sumofiber559.0 Mbps
22.Google LLC65159.0 Mbps
23.Hurricane Electric LLC2,30458.0 Mbps
24.Cincinnati Bell Telephone Company LLC6456.0 Mbps
25.Digitalocean5555.7 Mbps