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 (Jul 2019)

  ISP IPv6 tests count
1.Hurricane Electric LLC202
2.Telefonica O2 Cz135
3.Avonet126
4.Metronet101
5.Core-Backbone73
6.brumovice.net55
7.Upc Czech46
8.SITEL spol. s r.o.39
9.VIVO CONNECTION spol. s r.o.38
10.T-Mobile Czech Republic a.s.38
11.ELDATA prazska s.r.o.27
12.PODA a.s.24
13.Liberty Global Operations B.V.20
14.Cesnet6-tcz18
15.UVT Internet18
16.GTTs16
17.M247 Ltd15
18.Lemo-internet15
19.Master15
20.Internet Cz13
21.Ing. Roman Cvicek13
22.SMART Comp. a.s.11
23.T-2 d.o.o11
24.GIN's network10
25.OMEGA plus Chrudim s.r.o.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, Jul 2019)

  ISP Unique IPv6 addresses
1.Hurricane Electric LLC90
2.Telefonica O2 Cz70
3.Avonet64
4.brumovice.net37
5.Metronet30
6.T-Mobile Czech Republic a.s.22
7.Upc Czech17
8.VIVO CONNECTION spol. s r.o.14
9.UVT Internet12
10.Core-Backbone12
11.Liberty Global Operations B.V.12
12.Cesnet6-tcz11
13.Lemo-internet9
14.PODA a.s.9
15.SMART Comp. a.s.7
16.Starnet s.r.o.7
17.Internet Cz6
18.OMEGA plus Chrudim s.r.o.6
19.SITEL spol. s r.o.5
20.Karneval Media5
21.T-2 d.o.o5
22.GIN's network4
23.Ceske Radiokomunikace4
24.Telco Pro Services, a. s.3
25.M247 Ltd3

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 (Jul 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Telco Pro Services, a. s.500.0%5100.0%
2.Ceska Telekomunikacni Infrastruktura a.s600.0%6100.0%
3.GIN's network1000.0%10100.0%
4.T-Mobile Czech Republic a.s.3800.0%38100.0%
5.Starnet s.r.o.700.0%7100.0%
6.T-2 d.o.o1100.0%11100.0%
7.SMART Comp. a.s.1100.0%11100.0%
8.Network of Coolhousing500.0%5100.0%
9.Ceske Radiokomunikace600.0%6100.0%
10.SITEL spol. s r.o.3900.0%39100.0%
11.Lemo-internet1500.0%15100.0%
12.UVT Internet1800.0%18100.0%
13.Metronet10100.0%101100.0%
14.VIVO CONNECTION spol. s r.o.3800.0%38100.0%
15.brumovice.net5511.8%5498.2%
16.Avonet126129.5%11490.5%
17.Cesnet6-tcz18211.1%1688.9%
18.OMEGA plus Chrudim s.r.o.7114.3%685.7%
19.Hurricane Electric LLC2023919.3%16380.7%
20.Telefonica O2 Cz1352820.7%10779.3%
21.Liberty Global Operations B.V.20630.0%1470.0%
22.PODA a.s.24833.3%1666.7%
23.Upc Czech461941.3%2758.7%
24.Internet Cz13646.2%753.8%
25.GTTs161381.3%318.8%

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 (Jul 2019)

  ISP Test count IPv6 average
1.Liberty Global Operations B.V.2090.2 Mbps
2.M247 Ltd1584.1 Mbps
3.VIVO CONNECTION spol. s r.o.3860.9 Mbps
4.OMEGA plus Chrudim s.r.o.758.7 Mbps
5.SMART Comp. a.s.1157.4 Mbps
6.Ing. Roman Cvicek1346.5 Mbps
7.Hurricane Electric LLC20229.9 Mbps
8.T-Mobile Czech Republic a.s.3829.5 Mbps
9.UVT Internet1828.2 Mbps
10.Upc Czech4626.6 Mbps
11.Avonet12621.7 Mbps
12.Telefonica O2 Cz13519.8 Mbps
13.ELDATA prazska s.r.o.2717.8 Mbps
14.PODA a.s.2416.4 Mbps
15.SITEL spol. s r.o.3912.6 Mbps
16.Metronet1016.7 Mbps
17.Cesnet6-tcz185.0 Mbps
18.GTTs163.2 Mbps
19.Starnet s.r.o.70.0 Mbps
20.Network of Coolhousing50.0 Mbps
21.Master150.0 Mbps
22.Ceske Radiokomunikace60.0 Mbps
23.Lemo-internet150.0 Mbps
24.brumovice.net550.0 Mbps
25.Karneval Media70.0 Mbps