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 2020)

  ISP IPv6 tests count
1.Starnet s.r.o.145
2.Hurricane Electric LLC120
3.Telefonica O2 Cz112
4.Telco Pro Services, a. s.61
5.Core-Backbone46
6.Upc Czech44
7.brumovice.net39
8.Cesnet6-tcz37
9.Metronet32
10.PODA a.s.30
11.T-Mobile Czech Republic a.s.30
12.Internet Cz18
13.SMART Comp. a.s.17
14.Core4Net, s.r.o.17
15.Suntel Net s.r.o.16
16.Avonet10
17.UVT Internet9
18.M247 Ltd9
19.RIPE Network Coordination Center8
20.Vutbr68
21.AIRWAYNET, a.s.7
22.Amigonet7
23.WIA spol. s r.o.7
24.Casablanca INT network7
25.Ceska Telekomunikacni Infrastruktura a.s5

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 2020)

  ISP Unique IPv6 addresses
1.Starnet s.r.o.74
2.Hurricane Electric LLC52
3.Telefonica O2 Cz51
4.Upc Czech25
5.brumovice.net24
6.T-Mobile Czech Republic a.s.21
7.Metronet20
8.PODA a.s.14
9.Cesnet6-tcz14
10.SMART Comp. a.s.12
11.Core-Backbone11
12.Avonet9
13.Telco Pro Services, a. s.8
14.UVT Internet8
15.Core4Net, s.r.o.7
16.Suntel Net s.r.o.7
17.Amigonet7
18.RIPE Network Coordination Center7
19.Internet Cz5
20.AIRWAYNET, a.s.5
21.Casablanca INT network4
22.WIA spol. s r.o.3
23.KME, spol. s r. o.3
24.Vutbr63
25.Ceska Telekomunikacni Infrastruktura a.s2

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 2020)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Suntel Net s.r.o.1600.0%16100.0%
2.Warnet.cz500.0%5100.0%
3.KME, spol. s r. o.500.0%5100.0%
4.WIA spol. s r.o.700.0%7100.0%
5.Telco Pro Services, a. s.6100.0%61100.0%
6.Core4Net, s.r.o.1700.0%17100.0%
7.Metronet3200.0%32100.0%
8.Vutbr6800.0%8100.0%
9.AIRWAYNET, a.s.700.0%7100.0%
10.Casablanca INT network700.0%7100.0%
11.brumovice.net3900.0%39100.0%
12.INTERCONNECT s.r.o.500.0%5100.0%
13.Ceska Telekomunikacni Infrastruktura a.s500.0%5100.0%
14.RIPE Network Coordination Center800.0%8100.0%
15.Starnet s.r.o.14500.0%145100.0%
16.Upc Czech4436.8%4193.2%
17.Hurricane Electric LLC1201210.0%10890.0%
18.UVT Internet9111.1%888.9%
19.Amigonet7114.3%685.7%
20.Telefonica O2 Cz1122118.8%9181.3%
21.Cesnet6-tcz37718.9%3081.1%
22.Avonet10220.0%880.0%
23.T-Mobile Czech Republic a.s.30826.7%2273.3%
24.PODA a.s.301033.3%2066.7%
25.SMART Comp. a.s.17635.3%1164.7%

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 2020)

  ISP Test count IPv6 average
1.PODA a.s.3088.2 Mbps
2.KME, spol. s r. o.582.6 Mbps
3.Avonet1077.0 Mbps
4.Cesnet6-tcz3774.1 Mbps
5.Warnet.cz568.5 Mbps
6.UVT Internet967.8 Mbps
7.SMART Comp. a.s.1762.6 Mbps
8.Hurricane Electric LLC12041.0 Mbps
9.Vutbr6835.1 Mbps
10.Core4Net, s.r.o.1732.4 Mbps
11.WIA spol. s r.o.732.1 Mbps
12.Upc Czech4428.6 Mbps
13.AIRWAYNET, a.s.723.7 Mbps
14.Telefonica O2 Cz11222.0 Mbps
15.Starnet s.r.o.14520.4 Mbps
16.Metronet3215.4 Mbps
17.T-Mobile Czech Republic a.s.3012.4 Mbps
18.FASTER CZ spol. s r.o.50.4 Mbps
19.Telco Pro Services, a. s.610.0 Mbps
20.Core-Backbone460.0 Mbps
21.Internet Cz180.0 Mbps
22.brumovice.net390.0 Mbps
23.Casablanca INT network70.0 Mbps
24.Amigonet70.0 Mbps
25.M247 Ltd90.0 Mbps