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 (Jan 2017)

  ISP IPv6 tests count
1.Hurricane Electric972
2.Telefonica O2 Cz534
3.Upc Czech126
4.Planet A113
5.JMNet83
6.T-Mobile Czech Republic69
7.Starnet s.r.o.67
8.Poda58
9.Casablanca INT network57
10.Jaroslav Doubrava51
11.Eldata45
12.Cesnet6-tcz43
13.PilsFree40
14.GTTs35
15.network PVfreenet34
16.Network of Ignum Telekomunikace32
17.WIA s.r.o.31
18.UPC Ceska republika30
19.Telco Pro Services29
20.Grapesc I28
21.NFX network26
22.Cz.cznet24
23.Netbox24
24.Interconnect19
25.Dragon Internet19

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, Jan 2017)

  ISP Unique IPv6 addresses
1.Hurricane Electric454
2.Telefonica O2 Cz314
3.Planet A56
4.JMNet45
5.Upc Czech45
6.Poda45
7.T-Mobile Czech Republic38
8.Cesnet6-tcz29
9.Netbox18
10.UPC Ceska republika18
11.Grapesc I18
12.NFX network16
13.Starnet s.r.o.16
14.Cz.cznet15
15.GTTs15
16.Telco Pro Services14
17.Dattelkabel13
18.WIA s.r.o.12
19.PilsFree12
20.Interconnect11
21.Jaroslav Doubrava10
22.Casablanca INT network10
23.network PVfreenet10
24.GIN's network10
25.Vutbr69

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 (Jan 2017)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Freenet Liberec600.0%6100.0%
2.Time Warner Cable Internet LLC600.0%6100.0%
3.Rosacom600.0%6100.0%
4.Grapesc I2800.0%28100.0%
5.pernix700.0%7100.0%
6.Gts Novera1300.0%13100.0%
7.Master 1-mai1400.0%14100.0%
8.Sky Broadband600.0%6100.0%
9.JAW.cz500.0%5100.0%
10.GIN's network1500.0%15100.0%
11.Vutbr61300.0%13100.0%
12.FELDSAM s.r.o.1000.0%10100.0%
13.Starnet s.r.o.6734.5%6495.5%
14.RIPE Network Coordination Centre1715.9%1694.1%
15.network PVfreenet3425.9%3294.1%
16.Cesnet6-tcz4337.0%4093.0%
17.Ceske Radiokomunikace1119.1%1090.9%
18.ABAK network1119.1%1090.9%
19.Jaroslav Doubrava5159.8%4690.2%
20.JMNet83910.8%7489.2%
21.Poda58712.1%5187.9%
22.Empecom16212.5%1487.5%
23.Network of Coolhousing8112.5%787.5%
24.Upc Czech1261814.3%10885.7%
25.GTTs35514.3%3085.7%

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 (Jan 2017)

  ISP Test count IPv6 average
1.Cesnet6-tcz43133.3 Mbps
2.FELDSAM s.r.o.10106.1 Mbps
3.pernix791.9 Mbps
4.JMNet8372.7 Mbps
5.Planet-A1054.4 Mbps
6.Network of Ignum Telekomunikace3252.5 Mbps
7.JAW.cz549.4 Mbps
8.Ceske Radiokomunikace1144.5 Mbps
9.Karneval Media1338.1 Mbps
10.NFX network2633.9 Mbps
11.Dragon Internet1933.1 Mbps
12.Planet A11331.2 Mbps
13.ABAK network1130.9 Mbps
14.NetAir network627.0 Mbps
15.Interconnect1926.1 Mbps
16.Poda5825.2 Mbps
17.Rosacom624.8 Mbps
18.Starnet s.r.o.6722.3 Mbps
19.PilsFree4021.8 Mbps
20.Hurricane Electric97218.5 Mbps
21.CD-Telematika616.2 Mbps
22.Czechbone815.7 Mbps
23.Casablanca INT network5714.9 Mbps
24.Internet Cz1313.1 Mbps
25.T-Mobile Czech Republic6912.5 Mbps