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 2019)

  ISP IPv6 tests count
1.Telefonica O2 Cz388
2.Hurricane Electric127
3.T-Mobile Czech Republic92
4.Upc Czech84
5.Telco Pro Services76
6.Master 1-mai73
7.PODA a.s.65
8.Hurricane Electric LLC61
9.Core-Backbone41
10.Cesnet6-tcz32
11.INTERCONNECT s.r.o.26
12.Starnet s.r.o.25
13.Airwaynet22
14.Internet Cz19
15.VIVO CONNECTION spol. s r.o.19
16.Dial Telecom19
17.ELDATA prazska s.r.o.16
18.Planet A16
19.Cz.cznet13
20.UVT Internet12
21.SMART Comp. a.s.10
22.NFX network9
23.Cz.fixnet9
24.Lemo-internet9
25.GTTs8

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 2019)

  ISP Unique IPv6 addresses
1.Telefonica O2 Cz126
2.Hurricane Electric79
3.Upc Czech51
4.T-Mobile Czech Republic48
5.Telco Pro Services34
6.Hurricane Electric LLC33
7.PODA a.s.32
8.INTERCONNECT s.r.o.17
9.Starnet s.r.o.16
10.Cesnet6-tcz15
11.Planet A11
12.Core-Backbone11
13.VIVO CONNECTION spol. s r.o.10
14.ELDATA prazska s.r.o.9
15.UVT Internet9
16.Internet Cz8
17.Cz.fixnet8
18.Airwaynet8
19.Lemo-internet7
20.brumovice.net7
21.Dial Telecom7
22.M247 Ltd6
23.Liberty Global Operations B.V.6
24.SMART Comp. a.s.5
25.Dattelkabel5

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 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Master 1-mai7300.0%73100.0%
2.Airwaynet2200.0%22100.0%
3.Lemo-internet900.0%9100.0%
4.INTERCONNECT s.r.o.2600.0%26100.0%
5.UVT Internet1200.0%12100.0%
6.brumovice.net800.0%8100.0%
7.JMNet600.0%6100.0%
8.GIN's network500.0%5100.0%
9.Telco Pro Services7611.3%7598.7%
10.Dial Telecom1915.3%1894.7%
11.T-Mobile Czech Republic9255.4%8794.6%
12.Starnet s.r.o.2528.0%2392.0%
13.VIVO CONNECTION spol. s r.o.19210.5%1789.5%
14.NFX network9111.1%888.9%
15.Planet A16212.5%1487.5%
16.Avonet7114.3%685.7%
17.Hurricane Electric LLC611016.4%5183.6%
18.Amigonet6116.7%583.3%
19.Metronet6116.7%583.3%
20.Upc Czech841619.0%6881.0%
21.Hurricane Electric1272519.7%10280.3%
22.NWT Computer5120.0%480.0%
23.Internet Cz19421.1%1578.9%
24.Cz.fixnet9222.2%777.8%
25.Telefonica O2 Cz3889123.5%29776.5%

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 2019)

  ISP Test count IPv6 average
1.PODA a.s.65160.7 Mbps
2.Telco Pro Services76108.7 Mbps
3.Upc Czech8483.1 Mbps
4.VIVO CONNECTION spol. s r.o.1952.4 Mbps
5.Cesnet6-tcz3251.9 Mbps
6.Metronet648.2 Mbps
7.M247 Ltd745.8 Mbps
8.Karneval Media837.0 Mbps
9.Hurricane Electric LLC6136.8 Mbps
10.Hurricane Electric12724.4 Mbps
11.Avonet723.0 Mbps
12.Airwaynet2222.2 Mbps
13.Planet A1621.3 Mbps
14.UVT Internet1216.1 Mbps
15.Telefonica O2 Cz38815.6 Mbps
16.T-Mobile Czech Republic9212.4 Mbps
17.Dial Telecom1911.7 Mbps
18.Liberty Global Operations B.V.810.4 Mbps
19.Starnet s.r.o.258.9 Mbps
20.Amigonet67.5 Mbps
21.INTERCONNECT s.r.o.267.0 Mbps
22.NFX network96.6 Mbps
23.Cz.cznet130.0 Mbps
24.brumovice.net80.0 Mbps
25.ELDATA prazska s.r.o.160.0 Mbps