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 (Mar 2020)

  ISP IPv6 tests count
1.Hurricane Electric LLC199
2.Telefonica O2 Cz177
3.WEDOS Internet63
4.T-Mobile Czech Republic a.s.58
5.Upc Czech49
6.Core-Backbone47
7.Starnet s.r.o.46
8.Metronet42
9.Suntel Net s.r.o.31
10.brumovice.net30
11.SMART Comp. a.s.29
12.Internet Cz26
13.PODA a.s.16
14.Cesnet6-tcz13
15.Maxprogres12
16.AIRWAYNET, a.s.11
17.Miramo IP611
18.UVT Internet9
19.Kabeldeutschland9
20.GIN's network8
21.Master 1-mai8
22.Dial Telecom, a.s.7
23.Grapesc I7
24.Avonet5
25.Core4Net, s.r.o.5

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, Mar 2020)

  ISP Unique IPv6 addresses
1.Hurricane Electric LLC115
2.Telefonica O2 Cz103
3.Upc Czech32
4.T-Mobile Czech Republic a.s.32
5.Metronet25
6.brumovice.net21
7.Starnet s.r.o.21
8.SMART Comp. a.s.17
9.PODA a.s.14
10.Internet Cz12
11.Suntel Net s.r.o.11
12.Core-Backbone11
13.Cesnet6-tcz8
14.UVT Internet8
15.AIRWAYNET, a.s.7
16.Avonet5
17.Maxprogres5
18.Master 1-mai5
19.Core4Net, s.r.o.4
20.Grapesc I4
21.Kabeldeutschland4
22.Karneval Media4
23.GIN's network4
24.Dial Telecom, a.s.4
25.Miramo IP62

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 (Mar 2020)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.GIN's network800.0%8100.0%
2.Grapesc I700.0%7100.0%
3.Master 1-mai800.0%8100.0%
4.Cesnet6-tcz1300.0%13100.0%
5.AIRWAYNET, a.s.1100.0%11100.0%
6.Core4Net, s.r.o.500.0%5100.0%
7.Miramo IP61100.0%11100.0%
8.brumovice.net3000.0%30100.0%
9.Suntel Net s.r.o.3113.2%3096.8%
10.Upc Czech4936.1%4693.9%
11.Starnet s.r.o.4636.5%4393.5%
12.Metronet4237.1%3992.9%
13.T-Mobile Czech Republic a.s.5858.6%5391.4%
14.UVT Internet9111.1%888.9%
15.Kabeldeutschland9111.1%888.9%
16.Telefonica O2 Cz1772212.4%15587.6%
17.PODA a.s.16212.5%1487.5%
18.SMART Comp. a.s.29413.8%2586.2%
19.Hurricane Electric LLC1992814.1%17185.9%
20.Avonet5120.0%480.0%
21.WEDOS Internet631523.8%4876.2%
22.Maxprogres12433.3%866.7%
23.Internet Cz261038.5%1661.5%
24.Dial Telecom, a.s.7457.1%342.9%
25.Core-Backbone474595.7%24.3%

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 (Mar 2020)

  ISP Test count IPv6 average
1.PODA a.s.16205.3 Mbps
2.Upc Czech4979.7 Mbps
3.Dial Telecom, a.s.768.3 Mbps
4.Starnet s.r.o.4652.3 Mbps
5.UVT Internet952.1 Mbps
6.Metronet4241.5 Mbps
7.SMART Comp. a.s.2937.8 Mbps
8.Hurricane Electric LLC19935.5 Mbps
9.Core4Net, s.r.o.535.4 Mbps
10.Suntel Net s.r.o.3134.5 Mbps
11.T-Mobile Czech Republic a.s.5833.6 Mbps
12.Telefonica O2 Cz17727.8 Mbps
13.Avonet523.4 Mbps
14.Itself518.5 Mbps
15.Internet Cz2616.4 Mbps
16.Karneval Media50.8 Mbps
17.GIN's network80.0 Mbps
18.brumovice.net300.0 Mbps
19.WEDOS Internet630.0 Mbps
20.Miramo IP6110.0 Mbps
21.AIRWAYNET, a.s.110.0 Mbps
22.Cesnet6-tcz130.0 Mbps
23.Master 1-mai80.0 Mbps
24.Maxprogres120.0 Mbps
25.Core-Backbone470.0 Mbps