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 2018)

  ISP IPv6 tests count
1.Telefonica O2 Cz549
2.Hurricane Electric160
3.Hurricane Electric LLC120
4.Master 1-mai83
5.Lemo-internet66
6.Upc Czech56
7.Cesnet6-tcz53
8.Internet Cz52
9.Liberty Global Operations B.V.48
10.Casablanca INT network43
11.Core-Backbone43
12.INTERCONNECT s.r.o.35
13.PODA a.s.35
14.JMNet32
15.Nej.cz s.r.o.32
16.T-Mobile Czech Republic29
17.Avonet23
18.Starnet s.r.o.22
19.Metronet19
20.RIPE Network Coordination Center18
21.M247 Ltd16
22.Planet A14
23.KETNET s.r.o.12
24.Cz.cznet10
25.ELDATA prazska s.r.o.9

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 2018)

  ISP Unique IPv6 addresses
1.Telefonica O2 Cz167
2.Hurricane Electric98
3.Hurricane Electric LLC70
4.Lemo-internet37
5.Liberty Global Operations B.V.36
6.Upc Czech34
7.PODA a.s.25
8.T-Mobile Czech Republic25
9.Casablanca INT network22
10.Cesnet6-tcz21
11.INTERCONNECT s.r.o.19
12.Nej.cz s.r.o.19
13.Avonet14
14.Starnet s.r.o.14
15.Internet Cz11
16.Core-Backbone11
17.Planet A10
18.brumovice.net8
19.M247 Ltd8
20.Cz.cznet7
21.Metronet7
22.RIPE Network Coordination Center6
23.Vodafone Czech Republic6
24.ELDATA prazska s.r.o.6
25.Spcom5

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 2018)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Master 1-mai8300.0%83100.0%
2.Liberty Global Operations B.V.4800.0%48100.0%
3.Nej.cz s.r.o.3200.0%32100.0%
4.Ministerstvo Vnitra Cr500.0%5100.0%
5.RIPE Network Coordination Center1800.0%18100.0%
6.VEJNET.CZ s.r.o.600.0%6100.0%
7.Sys-datacom I600.0%6100.0%
8.brumovice.net800.0%8100.0%
9.INTERCONNECT s.r.o.3500.0%35100.0%
10.Spcom500.0%5100.0%
11.JMNet3213.1%3196.9%
12.Casablanca INT network4324.7%4195.3%
13.Lemo-internet6669.1%6090.9%
14.T-Mobile Czech Republic29310.3%2689.7%
15.Hurricane Electric1602113.1%13986.9%
16.Starnet s.r.o.22313.6%1986.4%
17.Hurricane Electric LLC1201714.2%10385.8%
18.PODA a.s.35514.3%3085.7%
19.Telefonica O2 Cz5497914.4%47085.6%
20.Metronet19315.8%1684.2%
21.GIN's network6116.7%583.3%
22.Avonet23417.4%1982.6%
23.Cesnet6-tcz531222.6%4177.4%
24.Upc Czech561323.2%4376.8%
25.Planet A14428.6%1071.4%

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 2018)

  ISP Test count IPv6 average
1.Upc Czech56107.1 Mbps
2.JMNet32105.1 Mbps
3.Cesnet6-tcz5376.0 Mbps
4.Internet Cz5247.9 Mbps
5.VEJNET.CZ s.r.o.645.7 Mbps
6.Sys-datacom I640.9 Mbps
7.PODA a.s.3540.6 Mbps
8.Planet A1430.3 Mbps
9.Hurricane Electric LLC12028.3 Mbps
10.INTERCONNECT s.r.o.3528.0 Mbps
11.Lemo-internet6627.5 Mbps
12.Hurricane Electric16019.4 Mbps
13.T-Mobile Czech Republic2919.3 Mbps
14.Telefonica O2 Cz54917.0 Mbps
15.Casablanca INT network4316.9 Mbps
16.Starnet s.r.o.227.1 Mbps
17.Avonet235.8 Mbps
18.Spcom50.0 Mbps
19.Cz.cznet100.0 Mbps
20.GIN's network60.0 Mbps
21.Vodafone Czech Republic70.0 Mbps
22.Nej.cz s.r.o.320.0 Mbps
23.Ministerstvo Vnitra Cr50.0 Mbps
24.Master 1-mai830.0 Mbps
25.ELDATA prazska s.r.o.90.0 Mbps