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 (Oct 2019)

  ISP IPv6 tests count
1.Telefonica O2 Cz207
2.Metronet134
3.Hurricane Electric LLC128
4.brumovice.net70
5.Ceske Radiokomunikace60
6.Upc Czech50
7.Core-Backbone40
8.Master40
9.GIN's network29
10.Avonet25
11.T-Mobile Czech Republic a.s.25
12.Cesnet6-tcz24
13.SMART Comp. a.s.20
14.Internet Cz20
15.WEDOS Internet18
16.UVT Internet18
17.PODA a.s.17
18.Sys-datacom I16
19.Starnet s.r.o.14
20.WIA spol. s r.o.12
21.M247 Ltd9
22.ELDATA prazska s.r.o.9
23.Vutbr69
24.GTTs9
25.Core4Net, 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, Oct 2019)

  ISP Unique IPv6 addresses
1.Telefonica O2 Cz103
2.Hurricane Electric LLC64
3.brumovice.net51
4.Ceske Radiokomunikace48
5.Upc Czech34
6.Avonet16
7.T-Mobile Czech Republic a.s.14
8.Cesnet6-tcz12
9.GIN's network12
10.SMART Comp. a.s.11
11.Starnet s.r.o.11
12.Core-Backbone11
13.Internet Cz11
14.Sys-datacom I10
15.PODA a.s.10
16.WIA spol. s r.o.8
17.Vutbr68
18.Metronet8
19.UVT Internet7
20.Core4Net, s.r.o.6
21.Suntel Net s.r.o.5
22.Network of Coolhousing5
23.Ceska Telekomunikacni Infrastruktura a.s4
24.M247 Ltd4
25.ABAK network3

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 (Oct 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Grapesc I500.0%5100.0%
2.SychrovNET s.r.o900.0%9100.0%
3.MetroHU500.0%5100.0%
4.GIN's network2900.0%29100.0%
5.Metronet13400.0%134100.0%
6.Core4Net, s.r.o.900.0%9100.0%
7.ABAK network600.0%6100.0%
8.Ceska Telekomunikacni Infrastruktura a.s700.0%7100.0%
9.Network of Coolhousing500.0%5100.0%
10.UVT Internet1800.0%18100.0%
11.Avonet2514.0%2496.0%
12.brumovice.net7034.3%6795.7%
13.Upc Czech5036.0%4794.0%
14.T-Mobile Czech Republic a.s.2528.0%2392.0%
15.Cesnet6-tcz2428.3%2291.7%
16.PODA a.s.17211.8%1588.2%
17.Starnet s.r.o.14214.3%1285.7%
18.WIA spol. s r.o.12216.7%1083.3%
19.Telefonica O2 Cz2073516.9%17283.1%
20.Hurricane Electric LLC1282418.8%10481.3%
21.Vutbr69222.2%777.8%
22.Master 1-mai7228.6%571.4%
23.SMART Comp. a.s.20735.0%1365.0%
24.Ceske Radiokomunikace602338.3%3761.7%
25.WEDOS Internet18738.9%1161.1%

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 (Oct 2019)

  ISP Test count IPv6 average
1.Metronet13485.4 Mbps
2.Upc Czech5076.6 Mbps
3.M247 Ltd969.7 Mbps
4.Grapesc I569.3 Mbps
5.Cesnet6-tcz2466.0 Mbps
6.PODA a.s.1745.9 Mbps
7.UVT Internet1845.6 Mbps
8.Telefonica O2 Cz20739.1 Mbps
9.Hurricane Electric LLC12837.7 Mbps
10.Master 1-mai731.8 Mbps
11.Sys-datacom I1629.4 Mbps
12.SMART Comp. a.s.2026.3 Mbps
13.T-Mobile Czech Republic a.s.2521.5 Mbps
14.Internet Cz2020.3 Mbps
15.Starnet s.r.o.1415.3 Mbps
16.Avonet2515.0 Mbps
17.Network of Coolhousing512.9 Mbps
18.WIA spol. s r.o.1210.1 Mbps
19.Ceske Radiokomunikace6010.1 Mbps
20.ABAK network66.7 Mbps
21.GIN's network290.0 Mbps
22.SychrovNET s.r.o90.0 Mbps
23.Ceska Telekomunikacni Infrastruktura a.s70.0 Mbps
24.Core4Net, s.r.o.90.0 Mbps
25.brumovice.net700.0 Mbps