Czech Republic IPv6 in Czech Republic

These graphs show the evolution of default protocol, v6 address types, and average bandwidth in Czech Republic 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 Czech Republic

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 Czech Republic (Feb 2018)

  ISP IPv6 tests count
1.Hurricane Electric667
2.Telefonica O2 Cz586
3.Starnet s.r.o.207
4.Upc Czech175
5.Planet A168
6.Cesnet6-tcz126
7.Poda121
8.Sys-datacom I.119
9.JMNet97
10.T-Mobile Czech Republic82
11.Casablanca INT network65
12.Eldata55
13.Lemo-internet47
14.GTTs47
15.Internet Cz40
16.WEDOS Internet37
17.UPC Ceska republika34
18.Sprava informacnich technologii mesta Plzne32
19.Pe3ny.net32
20.Cz.nic24
21.Ceske Radiokomunikace24
22.GIN's network23
23.Cdn77 Prg22
24.Master 1-mai21
25.WIA spol. s r.o.20

IPv6 and v4 protocol support in Czech Republic (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 Czech Republic (unique addresses, Feb 2018)

  ISP Unique IPv6 addresses
1.Hurricane Electric326
2.Telefonica O2 Cz323
3.Upc Czech114
4.Starnet s.r.o.113
5.Poda76
6.Cesnet6-tcz60
7.Planet A48
8.T-Mobile Czech Republic39
9.JMNet33
10.Casablanca INT network33
11.Sys-datacom I.32
12.Lemo-internet25
13.GTTs21
14.UPC Ceska republika21
15.GIN's network18
16.Ceske Radiokomunikace17
17.Karneval Media15
18.Pe3ny.net14
19.Internet Cz13
20.Amigonet12
21.Eldata12
22.Cdn77 Prg11
23.Dattelkabel11
24.Cz.nic10
25.NFX network10

Default browser protocol in Czech Republic

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 Czech Republic (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 Czech Republic (Feb 2018)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Ovh500.0%5100.0%
2.Narodni bezpecnostni urad800.0%8100.0%
3.brumovice.net1100.0%11100.0%
4.Airwaynet800.0%8100.0%
5.ABAK network1200.0%12100.0%
6.MORNET-CZ Campis700.0%7100.0%
7.JAW.cz1100.0%11100.0%
8.Pe3ny.net3200.0%32100.0%
9.Lemo-internet4700.0%47100.0%
10.Cdn77 Prg2200.0%22100.0%
11.Cetin1600.0%16100.0%
12.Metronet1000.0%10100.0%
13.UVT Internet1600.0%16100.0%
14.Sprava informacnich technologii mesta Plzne3213.1%3196.9%
15.GIN's network2314.3%2295.7%
16.Master 1-mai2114.8%2095.2%
17.Sys-datacom I.11965.0%11395.0%
18.Telefonica O2 Cz586366.1%55093.9%
19.WEDOS Internet3738.1%3491.9%
20.Telco Pro Services1119.1%1090.9%
21.Starnet s.r.o.2072110.1%18689.9%
22.NWT Computer9111.1%888.9%
23.Hurricane Electric6678012.0%58788.0%
24.Network of Coolhousing8112.5%787.5%
25.Poda1211714.0%10486.0%

IPv6 address types in Czech Republic

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 Czech Republic

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 Czech Republic (Feb 2018)

  ISP Test count IPv6 average
1.Narodni bezpecnostni urad8238.8 Mbps
2.Vutbr69160.5 Mbps
3.Cesnet6-tcz126156.0 Mbps
4.Sprava informacnich technologii mesta Plzne32101.8 Mbps
5.Upc Czech17574.9 Mbps
6.Vshosting773.6 Mbps
7.Poda12167.2 Mbps
8.NFX network1261.5 Mbps
9.Pe3ny.net3259.8 Mbps
10.Core-Backbone659.0 Mbps
11.JAW.cz1151.2 Mbps
12.JMNet9731.7 Mbps
13.Hurricane Electric66728.2 Mbps
14.Ceske Radiokomunikace2428.2 Mbps
15.WEDOS Internet3728.2 Mbps
16.Sys-datacom I.11924.4 Mbps
17.Starnet s.r.o.20721.5 Mbps
18.Metronet1021.5 Mbps
19.ABAK network1220.8 Mbps
20.M247-prague-servers720.5 Mbps
21.Planet A16819.7 Mbps
22.NWT Computer919.5 Mbps
23.Casablanca INT network6517.2 Mbps
24.Telefonica O2 Cz58616.7 Mbps
25.Airwaynet814.8 Mbps