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 2018)

  ISP IPv6 tests count
1.Telefonica O2 Cz244
2.UPC Ceska republika160
3.Hurricane Electric122
4.Hurricane Electric LLC95
5.Internet Cz78
6.Metronet64
7.Upc Czech60
8.Cesnet6-tcz56
9.Core-Backbone54
10.PODA a.s.47
11.Liberty Global Operations B.V.28
12.T-Mobile Czech Republic28
13.Vodafone Czech Republic22
14.Planet A22
15.Starnet s.r.o.21
16.Ceske Radiokomunikace20
17.M247 Ltd19
18.M-SOFT s.r.o17
19.Lemo-internet15
20.GTTs15
21.ELDATA prazska s.r.o.15
22.GIN's network12
23.Rosacom11
24.Casablanca INT network10
25.Gts Novera10

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 2018)

  ISP Unique IPv6 addresses
1.Telefonica O2 Cz138
2.Hurricane Electric67
3.Hurricane Electric LLC56
4.Upc Czech35
5.Cesnet6-tcz24
6.T-Mobile Czech Republic22
7.PODA a.s.22
8.Metronet20
9.Internet Cz20
10.Starnet s.r.o.17
11.Planet A16
12.Vodafone Czech Republic14
13.Liberty Global Operations B.V.13
14.Lemo-internet13
15.Core-Backbone12
16.Ceske Radiokomunikace9
17.Casablanca INT network8
18.UPC Ceska republika8
19.ELDATA prazska s.r.o.8
20.GIN's network7
21.Karneval Media6
22.Dial Telecom6
23.Master 1-mai5
24.Gts Novera5
25.INTERCONNECT s.r.o.5

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 2018)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Czechbone600.0%6100.0%
2.Lemo-internet1500.0%15100.0%
3.Telco Pro Services500.0%5100.0%
4.Development 777 s.r.o500.0%5100.0%
5.INTERCONNECT s.r.o.600.0%6100.0%
6.UVT Internet500.0%5100.0%
7.GIN's network1200.0%12100.0%
8.brumovice.net500.0%5100.0%
9.Gts Novera1000.0%10100.0%
10.Grapesc I600.0%6100.0%
11.Rosacom1100.0%11100.0%
12.Spcom500.0%5100.0%
13.PODA a.s.4712.1%4697.9%
14.Upc Czech6023.3%5896.7%
15.Telefonica O2 Cz244156.1%22993.9%
16.Starnet s.r.o.2129.5%1990.5%
17.Casablanca INT network10110.0%990.0%
18.Liberty Global Operations B.V.28310.7%2589.3%
19.AVAST Software s.r.o7114.3%685.7%
20.Cesnet6-tcz56916.1%4783.9%
21.Hurricane Electric1222318.9%9981.1%
22.Metronet641320.3%5179.7%
23.Vodafone Czech Republic22522.7%1777.3%
24.T-Mobile Czech Republic28725.0%2175.0%
25.Hurricane Electric LLC952425.3%7174.7%

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 2018)

  ISP Test count IPv6 average
1.Liberty Global Operations B.V.28153.0 Mbps
2.Dial Telecom687.2 Mbps
3.Cetin581.5 Mbps
4.Development 777 s.r.o563.8 Mbps
5.M-SOFT s.r.o1762.5 Mbps
6.Upc Czech6062.0 Mbps
7.Cesnet6-tcz5661.1 Mbps
8.PODA a.s.4739.0 Mbps
9.Planet A2230.6 Mbps
10.UPC Ceska republika16027.0 Mbps
11.Internet Cz7824.5 Mbps
12.UVT Internet521.0 Mbps
13.Telefonica O2 Cz24420.4 Mbps
14.Hurricane Electric12214.3 Mbps
15.Ceske Radiokomunikace2012.9 Mbps
16.Hurricane Electric LLC9512.0 Mbps
17.brumovice.net510.7 Mbps
18.Core-Backbone5410.5 Mbps
19.Network of Coolhousing58.4 Mbps
20.Gts Novera106.0 Mbps
21.Master 1-mai85.3 Mbps
22.Vodafone Czech Republic223.2 Mbps
23.T-Mobile Czech Republic282.7 Mbps
24.Starnet s.r.o.211.8 Mbps
25.Casablanca INT network101.7 Mbps