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 (Apr 2019)

  ISP IPv6 tests count
1.Telefonica O2 Cz298
2.Hurricane Electric LLC115
3.Hurricane Electric94
4.brumovice.net75
5.T-Mobile Czech Republic43
6.Core-Backbone41
7.T-Mobile Czech Republic a.s.39
8.Cesnet6-tcz36
9.Telco Pro Services34
10.GIN's network33
11.Internet Cz27
12.Upc Czech25
13.Master 1-mai23
14.Metronet19
15.ELDATA prazska s.r.o.18
16.T-2 d.o.o16
17.Starnet s.r.o.14
18.Lemo-internet13
19.GTTs13
20.Avonet9
21.Ceske Radiokomunikace9
22.Jaroslav Doubrava9
23.Planet A8
24.INTERCONNECT s.r.o.7
25.Telco Pro Services, a. s.7

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, Apr 2019)

  ISP Unique IPv6 addresses
1.Telefonica O2 Cz165
2.Hurricane Electric LLC58
3.brumovice.net43
4.Hurricane Electric40
5.T-Mobile Czech Republic32
6.Telco Pro Services21
7.T-Mobile Czech Republic a.s.19
8.Cesnet6-tcz15
9.GIN's network15
10.Upc Czech15
11.Core-Backbone11
12.T-2 d.o.o10
13.Starnet s.r.o.9
14.Lemo-internet9
15.ELDATA prazska s.r.o.9
16.Avonet8
17.Internet Cz8
18.Gts Novera6
19.JMNet5
20.Planet A5
21.PODA a.s.5
22.KETNET s.r.o.5
23.MetroHU4
24.Ceske Radiokomunikace4
25.Telco Pro Services, a. s.4

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 (Apr 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Telco Pro Services, a. s.700.0%7100.0%
2.PODA a.s.700.0%7100.0%
3.Vutbr-kom600.0%6100.0%
4.Core4Net, s.r.o.500.0%5100.0%
5.Zoner500.0%5100.0%
6.MetroHU500.0%5100.0%
7.T-2 d.o.o1600.0%16100.0%
8.Ceske Radiokomunikace900.0%9100.0%
9.Master 1-mai2300.0%23100.0%
10.Gts Novera700.0%7100.0%
11.Lemo-internet1300.0%13100.0%
12.VIVO CONNECTION spol. s r.o.500.0%5100.0%
13.Sprava informacnich technologii mesta Plzne500.0%5100.0%
14.Avonet900.0%9100.0%
15.T-Mobile Czech Republic a.s.3912.6%3897.4%
16.Telco Pro Services3412.9%3397.1%
17.brumovice.net7534.0%7296.0%
18.T-Mobile Czech Republic4324.7%4195.3%
19.Starnet s.r.o.1417.1%1392.9%
20.Telefonica O2 Cz298248.1%27491.9%
21.Hurricane Electric9488.5%8691.5%
22.Metronet19210.5%1789.5%
23.Upc Czech25312.0%2288.0%
24.INTERCONNECT s.r.o.7114.3%685.7%
25.JMNet6116.7%583.3%

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 (Apr 2019)

  ISP Test count IPv6 average
1.Core-Backbone4188.0 Mbps
2.GIN's network3379.1 Mbps
3.Sprava informacnich technologii mesta Plzne578.2 Mbps
4.KETNET s.r.o.670.9 Mbps
5.Upc Czech2564.2 Mbps
6.Hurricane Electric LLC11542.1 Mbps
7.Core4Net, s.r.o.540.8 Mbps
8.brumovice.net7536.0 Mbps
9.JMNet634.8 Mbps
10.Hurricane Electric9424.9 Mbps
11.INTERCONNECT s.r.o.723.2 Mbps
12.Telefonica O2 Cz29822.8 Mbps
13.Vutbr-kom622.5 Mbps
14.T-Mobile Czech Republic a.s.3921.8 Mbps
15.Vshosting518.8 Mbps
16.Cesnet6-tcz3618.8 Mbps
17.T-Mobile Czech Republic4314.6 Mbps
18.VIVO CONNECTION spol. s r.o.511.4 Mbps
19.Internet Cz279.7 Mbps
20.Ceska sit s.r.o.57.5 Mbps
21.Planet A83.9 Mbps
22.Ceske Radiokomunikace93.1 Mbps
23.ELDATA prazska s.r.o.182.8 Mbps
24.Zoner50.0 Mbps
25.MetroHU50.0 Mbps