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 2017)

  ISP IPv6 tests count
1.Hurricane Electric1,090
2.Telefonica O2 Cz517
3.Starnet s.r.o.170
4.Upc Czech154
5.Planet A132
6.JMNet84
7.Jaroslav Doubrava65
8.Poda64
9.Casablanca INT network60
10.Eldata58
11.GTTs52
12.T-Mobile Czech Republic51
13.ABAK network45
14.Cesnet6-tcz38
15.Dial Telecom36
16.Telco Pro Services31
17.Grapesc I28
18.UPC Ceska republika28
19.Dattelkabel26
20.Network of Ignum Telekomunikace25
21.Gts Novera25
22.GIN's network23
23.Planet-A22
24.NFX network21
25.Interconnect19

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 2017)

  ISP Unique IPv6 addresses
1.Hurricane Electric487
2.Telefonica O2 Cz309
3.Planet A73
4.Upc Czech61
5.Poda43
6.JMNet38
7.Starnet s.r.o.33
8.GTTs31
9.T-Mobile Czech Republic28
10.Jaroslav Doubrava22
11.Grapesc I19
12.Cesnet6-tcz19
13.UPC Ceska republika18
14.Dial Telecom18
15.NFX network16
16.ABAK network15
17.Telco Pro Services15
18.GIN's network14
19.Dattelkabel12
20.Netbox11
21.Interconnect11
22.Network of Ignum Telekomunikace11
23.Karneval Media9
24.Ceske Radiokomunikace9
25.Planet-A9

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 2017)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Sky Broadband600.0%6100.0%
2.Grapesc I2800.0%28100.0%
3.Time Warner Cable Internet LLC600.0%6100.0%
4.Vutbr61400.0%14100.0%
5.FELDSAM s.r.o.1000.0%10100.0%
6.Sys-datacom I.500.0%5100.0%
7.Empecom600.0%6100.0%
8.Freenet Liberec900.0%9100.0%
9.JAW.cz500.0%5100.0%
10.Comcast Cable Communications500.0%5100.0%
11.pernix700.0%7100.0%
12.InternalSpace101600.0%6100.0%
13.JMNet8433.6%8196.4%
14.Starnet s.r.o.17084.7%16295.3%
15.Cesnet6-tcz3825.3%3694.7%
16.GTTs5235.8%4994.2%
17.NWT Computer1616.3%1593.8%
18.RIPE Network Coordination Centre1616.3%1593.8%
19.Spoje.Net s.r.o.1317.7%1292.3%
20.Jaroslav Doubrava6557.7%6092.3%
21.Gts Novera2528.0%2392.0%
22.ABAK network4548.9%4191.1%
23.Planet A1321511.4%11788.6%
24.Ovanet17211.8%1588.2%
25.Upc Czech1542013.0%13487.0%

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 2017)

  ISP Test count IPv6 average
1.Cesnet6-tcz38113.8 Mbps
2.FELDSAM s.r.o.10106.1 Mbps
3.pernix791.9 Mbps
4.InternalSpace101670.3 Mbps
5.JAW.cz564.7 Mbps
6.NFX network2145.6 Mbps
7.Ceske Radiokomunikace1844.5 Mbps
8.Karneval Media1543.0 Mbps
9.Planet A13241.3 Mbps
10.Planet-A2238.4 Mbps
11.Network of Ignum Telekomunikace2534.5 Mbps
12.Dragon Internet1833.1 Mbps
13.NetAir network627.0 Mbps
14.Poda6426.5 Mbps
15.Interconnect1926.1 Mbps
16.Czechbone823.2 Mbps
17.ABAK network4522.3 Mbps
18.Starnet s.r.o.17019.6 Mbps
19.Hurricane Electric1,09018.6 Mbps
20.UPC Ceska republika2818.5 Mbps
21.Casablanca INT network6014.9 Mbps
22.CD-Telematika514.7 Mbps
23.Telefonica O2 Cz51713.4 Mbps
24.Internet Cz913.0 Mbps
25.Omegaplus812.3 Mbps