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 (Dec 2019)

  ISP IPv6 tests count
1.Hurricane Electric LLC255
2.Telefonica O2 Cz174
3.Internet Cz127
4.SMART Comp. a.s.115
5.Upc Czech85
6.T-Mobile Czech Republic a.s.50
7.UVT Internet46
8.PODA a.s.42
9.Core-Backbone37
10.brumovice.net27
11.AIRWAYNET, a.s.23
12.Metronet19
13.Starnet s.r.o.19
14.Cesnet6-tcz19
15.Gts Novera17
16.GTTs13
17.INTERCONNECT s.r.o.11
18.Karneval Media9
19.JMNet9
20.MetroHU9
21.Core4Net, s.r.o.8
22.M247 Ltd8
23.WIA spol. s r.o.7
24.NFX network7
25.Liberty Global Operations B.V.6

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, Dec 2019)

  ISP Unique IPv6 addresses
1.Telefonica O2 Cz110
2.Hurricane Electric LLC104
3.Upc Czech50
4.PODA a.s.29
5.T-Mobile Czech Republic a.s.27
6.brumovice.net21
7.SMART Comp. a.s.21
8.Starnet s.r.o.12
9.Cesnet6-tcz12
10.Core-Backbone11
11.UVT Internet9
12.Gts Novera8
13.Internet Cz8
14.JMNet6
15.MetroHU6
16.M247 Ltd6
17.Karneval Media6
18.Ceske Radiokomunikace5
19.Liberty Global Operations B.V.5
20.WIA spol. s r.o.5
21.AIRWAYNET, a.s.5
22.INTERCONNECT s.r.o.4
23.NFX network4
24.Metronet4
25.Core4Net, s.r.o.3

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 (Dec 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.MetroHU900.0%9100.0%
2.Cesnet6-tcz1900.0%19100.0%
3.Metronet1900.0%19100.0%
4.itself s.r.o.500.0%5100.0%
5.Starnet s.r.o.1900.0%19100.0%
6.P4ISP z.s.p.o. network500.0%5100.0%
7.INTERCONNECT s.r.o.1100.0%11100.0%
8.AIRWAYNET, a.s.2300.0%23100.0%
9.WIA spol. s r.o.700.0%7100.0%
10.JMNet900.0%9100.0%
11.Gts Novera1700.0%17100.0%
12.brumovice.net2700.0%27100.0%
13.Avonet500.0%5100.0%
14.Ceska Telekomunikacni Infrastruktura a.s600.0%6100.0%
15.UVT Internet4612.2%4597.8%
16.PODA a.s.4237.1%3992.9%
17.Upc Czech8578.2%7891.8%
18.Core4Net, s.r.o.8112.5%787.5%
19.T-Mobile Czech Republic a.s.50714.0%4386.0%
20.Hurricane Electric LLC2553614.1%21985.9%
21.NFX network7114.3%685.7%
22.Telefonica O2 Cz1742816.1%14683.9%
23.Liberty Global Operations B.V.6116.7%583.3%
24.Ceske Radiokomunikace6116.7%583.3%
25.SMART Comp. a.s.1152118.3%9481.7%

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 (Dec 2019)

  ISP Test count IPv6 average
1.JMNet987.8 Mbps
2.M247 Ltd883.5 Mbps
3.Upc Czech8569.1 Mbps
4.Hurricane Electric LLC25552.9 Mbps
5.PODA a.s.4248.8 Mbps
6.Cesnet6-tcz1947.4 Mbps
7.UVT Internet4647.2 Mbps
8.T-Mobile Czech Republic a.s.5041.0 Mbps
9.Starnet s.r.o.1938.2 Mbps
10.P4ISP z.s.p.o. network532.4 Mbps
11.Telefonica O2 Cz17431.7 Mbps
12.SMART Comp. a.s.11529.5 Mbps
13.Internet Cz12728.2 Mbps
14.Liberty Global Operations B.V.627.7 Mbps
15.Ceske Radiokomunikace616.2 Mbps
16.WIA spol. s r.o.715.1 Mbps
17.NFX network78.7 Mbps
18.INTERCONNECT s.r.o.118.2 Mbps
19.Karneval Media97.2 Mbps
20.itself s.r.o.50.0 Mbps
21.Metronet190.0 Mbps
22.MetroHU90.0 Mbps
23.brumovice.net270.0 Mbps
24.AIRWAYNET, a.s.230.0 Mbps
25.Gts Novera170.0 Mbps