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 2016)

  ISP IPv6 tests count
1.Hurricane Electric1,077
2.Telefonica O2 Cz581
3.Cesnet6-tcz104
4.Grapesc I71
5.T-Mobile Czech Republic69
6.JMNet64
7.Planet A57
8.Poda57
9.Eldata56
10.network PVfreenet54
11.Upc Czech53
12.PilsFree42
13.UPC Ceska republika40
14.Softex 6 I.40
15.GIN's network33
16.WIA s.r.o.31
17.Nextel-xdsl31
18.Netbox29
19.Optonet27
20.Karneval Media26
21.NFX network23
22.Rosacom20
23.Network of Ignum Telekomunikace19
24.Gts Novera18
25.Master 1-mai18

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 2016)

  ISP Unique IPv6 addresses
1.Hurricane Electric468
2.Telefonica O2 Cz338
3.Cesnet6-tcz57
4.T-Mobile Czech Republic45
5.JMNet44
6.Poda40
7.Planet A35
8.Grapesc I27
9.Netbox20
10.UPC Ceska republika20
11.network PVfreenet19
12.GIN's network18
13.Upc Czech16
14.Karneval Media14
15.PilsFree14
16.NFX network12
17.WIA s.r.o.12
18.Cz.cznet11
19.Vutbr611
20.Gts Novera10
21.Network of Ignum Telekomunikace10
22.Core-backbone-prag9
23.Casablanca INT network8
24.Starnet s.r.o.8
25.Optonet7

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 2016)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Grapesc I7100.0%71100.0%
2.Gts Novera1800.0%18100.0%
3.Softex 6 I.4000.0%40100.0%
4.Ceske Radiokomunikace700.0%7100.0%
5.Rosacom2000.0%20100.0%
6.KMS Network700.0%7100.0%
7.Zoner800.0%8100.0%
8.network PVfreenet5423.7%5296.3%
9.Master 1-mai1815.6%1794.4%
10.Optonet2727.4%2592.6%
11.NFX network2328.7%2191.3%
12.Upc Czech53713.2%4686.8%
13.Savvy s.r.o.7114.3%685.7%
14.Avonet7114.3%685.7%
15.Cesnet6-tcz1041514.4%8985.6%
16.Telefonica O2 Cz5818715.0%49485.0%
17.Hurricane Electric1,07716815.6%90984.4%
18.Empecom10220.0%880.0%
19.Network of Coolhousing5120.0%480.0%
20.Internet Cz9222.2%777.8%
21.PilsFree421023.8%3276.2%
22.Poda571424.6%4375.4%
23.T-Mobile Czech Republic691724.6%5275.4%
24.Pojistovna Ceske sporitelny8225.0%675.0%
25.JMNet641625.0%4875.0%

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 (Nov 2016)

  ISP Test count IPv6 average
1.Grapesc I71110.9 Mbps
2.Ceske Radiokomunikace797.3 Mbps
3.Savvy s.r.o.771.5 Mbps
4.Planet A5743.4 Mbps
5.Avonet742.4 Mbps
6.Upc Czech5341.5 Mbps
7.JMNet6439.1 Mbps
8.Network of Ignum Telekomunikace1939.0 Mbps
9.Cesnet6-tcz10437.7 Mbps
10.Softex 6 I.4036.0 Mbps
11.WEDOS Internet628.6 Mbps
12.Starnet s.r.o.1327.7 Mbps
13.Rosacom2024.8 Mbps
14.PilsFree4221.8 Mbps
15.Poda5719.8 Mbps
16.Hurricane Electric1,07719.3 Mbps
17.CD-Telematika1117.6 Mbps
18.Master 1-mai1816.8 Mbps
19.NFX network2316.8 Mbps
20.ABAK network1516.4 Mbps
21.GIN's network3313.8 Mbps
22.T-Mobile Czech Republic6912.8 Mbps
23.Telefonica O2 Cz58112.3 Mbps
24.Netbox297.2 Mbps
25.Nextel-xdsl315.0 Mbps