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 (Nov 2017)

  ISP IPv6 tests count
1.Telefonica O2 Cz871
2.Hurricane Electric735
3.Starnet s.r.o.262
4.Upc Czech230
5.T-Mobile Czech Republic135
6.Cesnet6-tcz129
7.Internet Cz124
8.Planet A121
9.Master 1-mai94
10.Poda70
11.Lemo-internet50
12.Eldata47
13.UVT Internet39
14.GTTs35
15.Airwaynet34
16.Cz.cznet33
17.WIA s.r.o.32
18.JMNet31
19.UPC Ceska republika30
20.Telco Pro Services29
21.Karneval Media29
22.Network of Coolhousing28
23.FELDSAM s.r.o.26
24.Ceske Radiokomunikace22
25.Vutbr620

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, Nov 2017)

  ISP Unique IPv6 addresses
1.Telefonica O2 Cz440
2.Hurricane Electric335
3.Upc Czech117
4.Cesnet6-tcz87
5.Starnet s.r.o.63
6.T-Mobile Czech Republic62
7.Planet A61
8.Poda52
9.Lemo-internet36
10.GTTs24
11.Internet Cz21
12.UPC Ceska republika21
13.Karneval Media20
14.Eldata20
15.Cz.cznet17
16.Telco Pro Services16
17.Ceske Radiokomunikace15
18.Airwaynet15
19.GIN's network14
20.Vutbr614
21.Network of Coolhousing14
22.JMNet13
23.Sys-datacom I.11
24.Casablanca INT network10
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 (Nov 2017)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Grapesc I500.0%5100.0%
2.Ovanet800.0%8100.0%
3.RIOMEDIA Network500.0%5100.0%
4.Lemo-internet5000.0%50100.0%
5.NFX network1200.0%12100.0%
6.MORNET-CZ Campis500.0%5100.0%
7.network PVfreenet900.0%9100.0%
8.JMNet3100.0%31100.0%
9.UVT Internet3912.6%3897.4%
10.GTTs3512.9%3497.1%
11.Starnet s.r.o.262103.8%25296.2%
12.T-Mobile Czech Republic13564.4%12995.6%
13.Airwaynet3425.9%3294.1%
14.GIN's network1715.9%1694.1%
15.Sys-datacom I.1516.7%1493.3%
16.Telco Pro Services2926.9%2793.1%
17.Netstone s.r.o.1417.1%1392.9%
18.Telefonica O2 Cz871748.5%79791.5%
19.Internet Cz124118.9%11391.1%
20.Heureka Shopping10110.0%990.0%
21.Vpsfree Tunnels19210.5%1789.5%
22.Planet A1211310.7%10889.3%
23.Cesnet6-tcz1291410.9%11589.1%
24.DTAG European region9111.1%888.9%
25.Poda70811.4%6288.6%

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 (Nov 2017)

  ISP Test count IPv6 average
1.Dial Telecom9170.2 Mbps
2.Upc Czech23065.4 Mbps
3.Cesnet6-tcz12950.1 Mbps
4.FELDSAM s.r.o.2647.6 Mbps
5.NFX network1244.9 Mbps
6.Poda7037.0 Mbps
7.TETAnet1131.1 Mbps
8.Planet A12130.1 Mbps
9.Network of Coolhousing2829.9 Mbps
10.CD-Telematika923.6 Mbps
11.Interconnect620.9 Mbps
12.Ceske Radiokomunikace2220.5 Mbps
13.T-Mobile Czech Republic13520.2 Mbps
14.JMNet3119.8 Mbps
15.Airwaynet3419.1 Mbps
16.Karneval Media2918.6 Mbps
17.Hurricane Electric73517.2 Mbps
18.UVT Internet3917.1 Mbps
19.Dattelkabel717.0 Mbps
20.Vutbr62014.8 Mbps
21.Casablanca INT network1214.7 Mbps
22.UPC Ceska republika3014.4 Mbps
23.Telefonica O2 Cz87114.4 Mbps
24.Starnet s.r.o.26214.1 Mbps
25.Sys-datacom I.1513.3 Mbps