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 (Sep 2019)

  ISP IPv6 tests count
1.Telefonica O2 Cz176
2.Hurricane Electric LLC131
3.brumovice.net64
4.Core-Backbone61
5.Metronet56
6.Avonet49
7.Upc Czech37
8.CD-Telematika a.s.37
9.Master29
10.Internet Cz26
11.ELDATA prazska s.r.o.25
12.T-Mobile Czech Republic a.s.25
13.GTTs24
14.Comfeel22
15.UVT Internet20
16.M247 Ltd18
17.Cesnet6-tcz17
18.SychrovNET s.r.o16
19.Core4Net, s.r.o.14
20.network PVfreenet13
21.Suntel Net s.r.o.11
22.Starnet s.r.o.11
23.PODA a.s.11
24.WIA spol. s r.o.11
25.SMART Comp. a.s.10

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, Sep 2019)

  ISP Unique IPv6 addresses
1.Telefonica O2 Cz89
2.Hurricane Electric LLC61
3.brumovice.net48
4.Upc Czech24
5.Metronet22
6.Avonet20
7.Comfeel14
8.CD-Telematika a.s.12
9.Core-Backbone11
10.Internet Cz11
11.T-Mobile Czech Republic a.s.10
12.Starnet s.r.o.9
13.Suntel Net s.r.o.9
14.SMART Comp. a.s.8
15.PODA a.s.8
16.Core4Net, s.r.o.8
17.UVT Internet8
18.Ceske Radiokomunikace6
19.Cesnet6-tcz6
20.Telco Pro Services, a. s.5
21.T-2 d.o.o5
22.WIA spol. s r.o.5
23.GIN's network4
24.network PVfreenet4
25.P4ISP z.s.p.o. 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 (Sep 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.OMEGA plus Chrudim s.r.o.500.0%5100.0%
2.GIN's network600.0%6100.0%
3.T-2 d.o.o1000.0%10100.0%
4.Ceske Radiokomunikace600.0%6100.0%
5.UVT Internet2000.0%20100.0%
6.SMART Comp. a.s.1000.0%10100.0%
7.Telco Pro Services, a. s.900.0%9100.0%
8.Starnet s.r.o.1100.0%11100.0%
9.PODA a.s.1100.0%11100.0%
10.Core4Net, s.r.o.1400.0%14100.0%
11.Avonet4900.0%49100.0%
12.Casablanca INT network500.0%5100.0%
13.P4ISP z.s.p.o. network800.0%8100.0%
14.Windyghoul s.r.o.900.0%9100.0%
15.brumovice.net6411.6%6398.4%
16.Metronet5611.8%5598.2%
17.Upc Czech3712.7%3697.3%
18.Cesnet6-tcz1715.9%1694.1%
19.T-Mobile Czech Republic a.s.2528.0%2392.0%
20.Telefonica O2 Cz1761810.2%15889.8%
21.network PVfreenet13215.4%1184.6%
22.CD-Telematika a.s.37616.2%3183.8%
23.Hurricane Electric LLC1312720.6%10479.4%
24.Comfeel22522.7%1777.3%
25.SychrovNET s.r.o16425.0%1275.0%

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 (Sep 2019)

  ISP Test count IPv6 average
1.OMEGA plus Chrudim s.r.o.565.2 Mbps
2.Upc Czech3765.0 Mbps
3.M247 Ltd1853.5 Mbps
4.network PVfreenet1348.2 Mbps
5.UVT Internet2043.2 Mbps
6.SMART Comp. a.s.1033.6 Mbps
7.Metronet5631.3 Mbps
8.P4ISP z.s.p.o. network830.2 Mbps
9.Telefonica O2 Cz17630.1 Mbps
10.Hurricane Electric LLC13123.6 Mbps
11.Core4Net, s.r.o.1422.3 Mbps
12.Internet Cz2621.7 Mbps
13.Ceske Radiokomunikace616.1 Mbps
14.ELDATA prazska s.r.o.2514.2 Mbps
15.WIA spol. s r.o.118.3 Mbps
16.brumovice.net647.2 Mbps
17.T-Mobile Czech Republic a.s.255.1 Mbps
18.CD-Telematika a.s.371.3 Mbps
19.Telco Pro Services, a. s.90.0 Mbps
20.Master290.0 Mbps
21.SychrovNET s.r.o160.0 Mbps
22.GIN's network60.0 Mbps
23.GTTs240.0 Mbps
24.PODA a.s.110.0 Mbps
25.Comfeel220.0 Mbps