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 (May 2019)

  ISP IPv6 tests count
1.Hurricane Electric LLC362
2.Telefonica O2 Cz163
3.Telco Pro Services, a. s.107
4.brumovice.net61
5.Upc Czech53
6.Pe3ny.net52
7.T-Mobile Czech Republic a.s.50
8.Master 1-mai49
9.Core-Backbone31
10.Avonet26
11.T-2 d.o.o23
12.Starnet s.r.o.22
13.ha-vel internet s.r.o.21
14.INTERCONNECT s.r.o.19
15.ELDATA prazska s.r.o.18
16.Internet Cz17
17.UVT Internet17
18.Cesnet6-tcz16
19.Karneval Media16
20.GTTs13
21.MetroHU12
22.Lemo-internet11
23.Neutral Free eXchange members - FreeTel alternate10
24.SMART Comp. a.s.9
25.Sprava informacnich technologii mesta Plzne, p.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, May 2019)

  ISP Unique IPv6 addresses
1.Hurricane Electric LLC132
2.Telefonica O2 Cz113
3.Telco Pro Services, a. s.52
4.Upc Czech37
5.brumovice.net37
6.T-Mobile Czech Republic a.s.22
7.Starnet s.r.o.17
8.Avonet13
9.UVT Internet12
10.INTERCONNECT s.r.o.12
11.Core-Backbone11
12.MetroHU10
13.Lemo-internet10
14.T-2 d.o.o9
15.Cesnet6-tcz7
16.SMART Comp. a.s.7
17.Pe3ny.net6
18.Karneval Media6
19.Internet Cz6
20.Durnet.cz sro5
21.NFX network5
22.ELDATA prazska s.r.o.5
23.ha-vel internet s.r.o.4
24.Sys-datacom I4
25.Sprava informacnich technologii mesta Plzne, p.o.3

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 (May 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Sys-datacom I500.0%5100.0%
2.brumovice.net6100.0%61100.0%
3.MetroHU1200.0%12100.0%
4.Durnet.cz sro800.0%8100.0%
5.Spcom500.0%5100.0%
6.Nej.cz s.r.o.700.0%7100.0%
7.network PVfreenet500.0%5100.0%
8.ha-vel internet s.r.o.2100.0%21100.0%
9.Master 1-mai4900.0%49100.0%
10.T-2 d.o.o2300.0%23100.0%
11.Lemo-internet1100.0%11100.0%
12.Pe3ny.net5211.9%5198.1%
13.T-Mobile Czech Republic a.s.5012.0%4998.0%
14.Telco Pro Services, a. s.10743.7%10396.3%
15.Avonet2613.8%2596.2%
16.Telefonica O2 Cz16374.3%15695.7%
17.INTERCONNECT s.r.o.1915.3%1894.7%
18.Hurricane Electric LLC3623710.2%32589.8%
19.WIA spol. s r.o.9111.1%888.9%
20.Internet Cz17211.8%1588.2%
21.Upc Czech53815.1%4584.9%
22.bnet-internet.cz6116.7%583.3%
23.UVT Internet17317.6%1482.4%
24.Starnet s.r.o.22418.2%1881.8%
25.NFX network5120.0%480.0%

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 (May 2019)

  ISP Test count IPv6 average
1.Sprava informacnich technologii mesta Plzne, p.o.9213.8 Mbps
2.Cesnet6-tcz1687.4 Mbps
3.NFX network586.0 Mbps
4.Upc Czech5369.2 Mbps
5.Pe3ny.net5259.5 Mbps
6.Internet Cz1748.9 Mbps
7.SMART Comp. a.s.939.2 Mbps
8.Avonet2631.2 Mbps
9.INTERCONNECT s.r.o.1927.9 Mbps
10.UVT Internet1727.4 Mbps
11.T-Mobile Czech Republic a.s.5025.0 Mbps
12.Hurricane Electric LLC36222.7 Mbps
13.Telefonica O2 Cz16320.7 Mbps
14.Durnet.cz sro819.9 Mbps
15.WIA spol. s r.o.916.9 Mbps
16.Sys-datacom I516.4 Mbps
17.MetroHU120.0 Mbps
18.ha-vel internet s.r.o.210.0 Mbps
19.Neutral Free eXchange members - FreeTel alternate100.0 Mbps
20.Vpsfree Prg250.0 Mbps
21.bnet-internet.cz60.0 Mbps
22.T-2 d.o.o230.0 Mbps
23.Spcom50.0 Mbps
24.Master 1-mai490.0 Mbps
25.network PVfreenet50.0 Mbps