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 (Jun 2019)

  ISP IPv6 tests count
1.Telefonica O2 Cz202
2.Hurricane Electric LLC169
3.T-Mobile Czech Republic a.s.104
4.brumovice.net82
5.Avonet61
6.Metronet45
7.Core-Backbone37
8.PODA a.s.31
9.Master 1-mai27
10.GTTs24
11.ELDATA prazska s.r.o.22
12.Starnet s.r.o.21
13.Internet Cz20
14.Upc Czech17
15.UVT Internet16
16.Telco Pro Services, a. s.15
17.Liberty Global Operations B.V.13
18.Cesnet6-tcz11
19.WIA spol. s r.o.11
20.Dial Telecom, a.s.11
21.Marek Smutny10
22.MetroHU10
23.T-2 d.o.o10
24.Zoner9
25.SMART Comp. a.s.7

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, Jun 2019)

  ISP Unique IPv6 addresses
1.Telefonica O2 Cz108
2.Hurricane Electric LLC94
3.brumovice.net53
4.T-Mobile Czech Republic a.s.49
5.Avonet41
6.Metronet25
7.Starnet s.r.o.18
8.Upc Czech16
9.PODA a.s.12
10.Core-Backbone11
11.Telco Pro Services, a. s.9
12.MetroHU8
13.Internet Cz8
14.UVT Internet7
15.Cesnet6-tcz7
16.T-2 d.o.o6
17.Dial Telecom, a.s.6
18.SMART Comp. a.s.6
19.WIA spol. s r.o.5
20.Suntel Net s.r.o.5
21.Lemo-internet5
22.Liberty Global Operations B.V.5
23.WEDOS Internet4
24.INTERCONNECT s.r.o.4
25.ELDATA prazska s.r.o.4

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 (Jun 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Master 1-mai2700.0%27100.0%
2.T-Mobile Czech Republic a.s.10400.0%104100.0%
3.Lemo-internet600.0%6100.0%
4.Metronet4500.0%45100.0%
5.Ceska Telekomunikacni Infrastruktura a.s500.0%5100.0%
6.Liberty Global Operations B.V.1300.0%13100.0%
7.Telco Pro Services, a. s.1500.0%15100.0%
8.brumovice.net8200.0%82100.0%
9.Suntel Net s.r.o.700.0%7100.0%
10.Upc Czech1700.0%17100.0%
11.SMART Comp. a.s.700.0%7100.0%
12.WEDOS Internet600.0%6100.0%
13.WIA spol. s r.o.1100.0%11100.0%
14.T-2 d.o.o1000.0%10100.0%
15.INTERCONNECT s.r.o.600.0%6100.0%
16.UVT Internet1600.0%16100.0%
17.Dial Telecom, a.s.1100.0%11100.0%
18.PODA a.s.3113.2%3096.8%
19.Avonet6123.3%5996.7%
20.Starnet s.r.o.2114.8%2095.2%
21.Telefonica O2 Cz202157.4%18792.6%
22.MetroHU10110.0%990.0%
23.Hurricane Electric LLC1695029.6%11970.4%
24.Zoner9333.3%666.7%
25.Internet Cz20735.0%1365.0%

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 (Jun 2019)

  ISP Test count IPv6 average
1.PODA a.s.3187.2 Mbps
2.M247 Ltd547.5 Mbps
3.Hurricane Electric LLC16946.7 Mbps
4.Upc Czech1745.1 Mbps
5.Metronet4544.7 Mbps
6.Avonet6143.5 Mbps
7.Starnet s.r.o.2139.4 Mbps
8.Telco Pro Services, a. s.1538.4 Mbps
9.UVT Internet1623.9 Mbps
10.INTERCONNECT s.r.o.622.6 Mbps
11.Telefonica O2 Cz20219.0 Mbps
12.T-Mobile Czech Republic a.s.10417.4 Mbps
13.SMART Comp. a.s.716.1 Mbps
14.Zoner913.0 Mbps
15.WIA spol. s r.o.117.7 Mbps
16.Ceska Telekomunikacni Infrastruktura a.s50.0 Mbps
17.Liberty Global Operations B.V.130.0 Mbps
18.Master 1-mai270.0 Mbps
19.Lemo-internet60.0 Mbps
20.Marek Smutny100.0 Mbps
21.MetroHU100.0 Mbps
22.WEDOS Internet60.0 Mbps
23.brumovice.net820.0 Mbps
24.Hosting9050.0 Mbps
25.Suntel Net s.r.o.70.0 Mbps