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 (Sep 2017)

  ISP IPv6 tests count
1.Hurricane Electric745
2.Telefonica O2 Cz644
3.Starnet s.r.o.248
4.Upc Czech136
5.Lemo-internet91
6.Internet Cz90
7.JMNet74
8.T-Mobile Czech Republic69
9.Poda67
10.Eldata66
11.Jaroslav Doubrava63
12.Planet A42
13.UPC Ceska republika41
14.Cz.cznet34
15.Cesnet6-tcz33
16.GIN's network27
17.GTTs26
18.Sys-datacom I.24
19.Amigonet24
20.Master 1-mai20
21.Sprava informacnich technologii mesta Plzne19
22.Dragon's network18
23.Ceske Radiokomunikace17
24.Pojistovna Ceske sporitelny17
25.ABAK network16

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, Sep 2017)

  ISP Unique IPv6 addresses
1.Telefonica O2 Cz364
2.Hurricane Electric314
3.Starnet s.r.o.81
4.Upc Czech66
5.Poda53
6.Lemo-internet49
7.T-Mobile Czech Republic42
8.JMNet39
9.Jaroslav Doubrava35
10.Cesnet6-tcz23
11.Planet A21
12.Eldata19
13.Internet Cz19
14.UPC Ceska republika19
15.Amigonet18
16.GTTs16
17.Ceske Radiokomunikace14
18.Karneval Media13
19.GIN's network11
20.Sys-datacom I.11
21.Telco Pro Services11
22.NFX network10
23.Cz.cznet10
24.Sprava informacnich technologii mesta Plzne9
25.DTAG European region9

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 (Sep 2017)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Heureka Shopping700.0%7100.0%
2.Zoner600.0%6100.0%
3.Kmenet500.0%5100.0%
4.Pojistovna Ceske sporitelny1700.0%17100.0%
5.CD-Telematika600.0%6100.0%
6.Lemo-internet9100.0%91100.0%
7.Spoje.Net s.r.o.700.0%7100.0%
8.Ovanet600.0%6100.0%
9.Grapesc I600.0%6100.0%
10.Starnet s.r.o.24852.0%24398.0%
11.GTTs2613.8%2596.2%
12.Internet Cz9044.4%8695.6%
13.Sprava informacnich technologii mesta Plzne1915.3%1894.7%
14.JMNet7445.4%7094.6%
15.Cesnet6-tcz3326.1%3193.9%
16.Poda6757.5%6292.5%
17.DTAG European region1119.1%1090.9%
18.Casablanca INT network1119.1%1090.9%
19.Telefonica O2 Cz644629.6%58290.4%
20.Netstone s.r.o.10110.0%990.0%
21.Jaroslav Doubrava63711.1%5688.9%
22.T-Mobile Czech Republic69811.6%6188.4%
23.Ceske Radiokomunikace17211.8%1588.2%
24.Telco Pro Services15213.3%1386.7%
25.Hurricane Electric74510614.2%63985.8%

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 (Sep 2017)

  ISP Test count IPv6 average
1.JMNet7478.1 Mbps
2.Jaroslav Doubrava6375.6 Mbps
3.Upc Czech13669.8 Mbps
4.Poda6752.7 Mbps
5.Dragon Internet944.9 Mbps
6.Sprava informacnich technologii mesta Plzne1942.1 Mbps
7.Planet A4231.5 Mbps
8.Kmenet529.6 Mbps
9.Hurricane Electric74527.4 Mbps
10.Karneval Media1425.1 Mbps
11.T-Mobile Czech Republic6923.0 Mbps
12.Network of Coolhousing822.0 Mbps
13.NFX network1320.8 Mbps
14.UPC Ceska republika4120.0 Mbps
15.Interconnect519.6 Mbps
16.Sys-datacom I.2419.1 Mbps
17.Telefonica O2 Cz64418.2 Mbps
18.Dattelkabel817.9 Mbps
19.Planet-A616.9 Mbps
20.Starnet s.r.o.24815.3 Mbps
21.Vutbr61015.0 Mbps
22.Internet Cz9010.9 Mbps
23.Master 1-mai2010.7 Mbps
24.GIN's network279.6 Mbps
25.Amigonet249.3 Mbps