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 (Aug 2019)

  ISP IPv6 tests count
1.Telefonica O2 Cz230
2.Hurricane Electric LLC109
3.Core-Backbone67
4.TaNET West s.r.o.41
5.T-Mobile Czech Republic a.s.35
6.Upc Czech34
7.Cesnet6-tcz29
8.brumovice.net27
9.Metronet24
10.ELDATA prazska s.r.o.23
11.SMART Comp. a.s.22
12.M247 Ltd21
13.UVT Internet18
14.Internet Cz18
15.INTERCONNECT s.r.o.16
16.PODA a.s.16
17.Master14
18.GTTs14
19.Avonet14
20.Casablanca INT network14
21.Core4Net, s.r.o.12
22.Suntel Net s.r.o.11
23.Karneval Media9
24.Starnet s.r.o.9
25.WEDOS Internet9

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, Aug 2019)

  ISP Unique IPv6 addresses
1.Telefonica O2 Cz117
2.Hurricane Electric LLC57
3.T-Mobile Czech Republic a.s.29
4.brumovice.net22
5.Upc Czech19
6.SMART Comp. a.s.18
7.TaNET West s.r.o.15
8.Avonet13
9.Core-Backbone12
10.UVT Internet10
11.Internet Cz10
12.Metronet10
13.M247 Ltd9
14.Core4Net, s.r.o.8
15.Suntel Net s.r.o.7
16.PODA a.s.7
17.Starnet s.r.o.6
18.INTERCONNECT s.r.o.6
19.Karneval Media6
20.Hurricane Electric5
21.T-2 d.o.o5
22.Ceske Radiokomunikace5
23.ELDATA prazska s.r.o.5
24.WIA spol. s r.o.5
25.Cesnet6-tcz4

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 (Aug 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.UVT Internet1800.0%18100.0%
2.Core4Net, s.r.o.1200.0%12100.0%
3.INTERCONNECT s.r.o.1600.0%16100.0%
4.VIVO CONNECTION spol. s r.o.700.0%7100.0%
5.Casablanca INT network1400.0%14100.0%
6.T-2 d.o.o600.0%6100.0%
7.MetroHU500.0%5100.0%
8.brumovice.net2700.0%27100.0%
9.Hurricane Electric500.0%5100.0%
10.Metronet2400.0%24100.0%
11.Gts Novera700.0%7100.0%
12.T-Mobile Czech Republic a.s.3525.7%3394.3%
13.Avonet1417.1%1392.9%
14.Cesnet6-tcz29310.3%2689.7%
15.Starnet s.r.o.9111.1%888.9%
16.Upc Czech34411.8%3088.2%
17.Telefonica O2 Cz2303716.1%19383.9%
18.Ceske Radiokomunikace6116.7%583.3%
19.PODA a.s.16318.8%1381.3%
20.WIA spol. s r.o.5120.0%480.0%
21.Internet Expert s.r.o.5120.0%480.0%
22.TaNET West s.r.o.411024.4%3175.6%
23.Hurricane Electric LLC1092724.8%8275.2%
24.WEDOS Internet9333.3%666.7%
25.Internet Cz18633.3%1266.7%

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 (Aug 2019)

  ISP Test count IPv6 average
1.Upc Czech3456.4 Mbps
2.PODA a.s.1645.0 Mbps
3.Metronet2435.6 Mbps
4.Starnet s.r.o.935.1 Mbps
5.SMART Comp. a.s.2233.9 Mbps
6.Gts Novera728.1 Mbps
7.UVT Internet1823.4 Mbps
8.Hurricane Electric LLC10922.2 Mbps
9.M247 Ltd2120.2 Mbps
10.Telefonica O2 Cz23019.7 Mbps
11.INTERCONNECT s.r.o.1618.6 Mbps
12.ELDATA prazska s.r.o.2316.1 Mbps
13.Internet Cz1816.0 Mbps
14.T-Mobile Czech Republic a.s.3512.7 Mbps
15.Cesnet6-tcz295.8 Mbps
16.WIA spol. s r.o.55.3 Mbps
17.Avonet140.8 Mbps
18.VIVO CONNECTION spol. s r.o.70.0 Mbps
19.T-2 d.o.o60.0 Mbps
20.brumovice.net270.0 Mbps
21.TaNET West s.r.o.410.0 Mbps
22.Hurricane Electric50.0 Mbps
23.WEDOS Internet90.0 Mbps
24.Casablanca INT network140.0 Mbps
25.Internet Expert s.r.o.50.0 Mbps