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 (Mar 2019)

  ISP IPv6 tests count
1.Hurricane Electric307
2.Telefonica O2 Cz286
3.Hurricane Electric LLC110
4.Upc Czech107
5.Telco Pro Services99
6.brumovice.net54
7.Starnet s.r.o.53
8.Core-Backbone39
9.T-Mobile Czech Republic37
10.Internet Cz37
11.Cesnet6-tcz25
12.Lemo-internet22
13.ELDATA prazska s.r.o.20
14.INTERCONNECT s.r.o.20
15.Planet A19
16.Master 1-mai17
17.Magnalink16
18.Gts Novera16
19.Moravskoslezske inovacni centrum Ostrava13
20.Sitkom13
21.NFX network12
22.Metronet11
23.PODA a.s.10
24.Dial Telecom9
25.GTTs8

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, Mar 2019)

  ISP Unique IPv6 addresses
1.Telefonica O2 Cz134
2.Hurricane Electric88
3.Hurricane Electric LLC69
4.Telco Pro Services50
5.brumovice.net39
6.Starnet s.r.o.29
7.T-Mobile Czech Republic28
8.Upc Czech20
9.Cesnet6-tcz18
10.Lemo-internet16
11.Core-Backbone11
12.NFX network11
13.Gts Novera11
14.ELDATA prazska s.r.o.11
15.Magnalink10
16.Internet Cz10
17.PODA a.s.9
18.INTERCONNECT s.r.o.9
19.M247 Ltd6
20.VIVO CONNECTION spol. s r.o.6
21.NWT Computer6
22.Metropolitni sit Humpolec spol. s r.o5
23.Moravskoslezske inovacni centrum Ostrava4
24.Metronet4
25.Planet A4

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 (Mar 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Metropolitni sit Humpolec spol. s r.o600.0%6100.0%
2.Vpsfree Tunnels500.0%5100.0%
3.NWT Computer600.0%6100.0%
4.LajsiNET700.0%7100.0%
5.Nej.cz s.r.o.500.0%5100.0%
6.PODA a.s.1000.0%10100.0%
7.Metronet1100.0%11100.0%
8.VIVO CONNECTION spol. s r.o.600.0%6100.0%
9.Master 1-mai1700.0%17100.0%
10.Lemo-internet2200.0%22100.0%
11.Telco Pro Services9922.0%9798.0%
12.brumovice.net5423.7%5296.3%
13.Cesnet6-tcz2514.0%2496.0%
14.INTERCONNECT s.r.o.2015.0%1995.0%
15.T-Mobile Czech Republic3738.1%3491.9%
16.Starnet s.r.o.53611.3%4788.7%
17.Hurricane Electric3073611.7%27188.3%
18.Telefonica O2 Cz2863411.9%25288.1%
19.Gts Novera16212.5%1487.5%
20.GIN's network7114.3%685.7%
21.Upc Czech1071615.0%9185.0%
22.Sitkom13215.4%1184.6%
23.Planet A19421.1%1578.9%
24.Hurricane Electric LLC1102421.8%8678.2%
25.NFX network12325.0%975.0%

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 (Mar 2019)

  ISP Test count IPv6 average
1.Cesnet6-tcz25343.4 Mbps
2.Upc Czech107212.6 Mbps
3.COMTEX s.r.o.5167.5 Mbps
4.Magnalink16143.9 Mbps
5.Telco Pro Services9971.7 Mbps
6.Internet Cz3758.5 Mbps
7.Sitkom1347.2 Mbps
8.Planet A1933.1 Mbps
9.Hurricane Electric LLC11025.1 Mbps
10.Dial Telecom924.4 Mbps
11.NFX network1221.5 Mbps
12.Hurricane Electric30719.2 Mbps
13.Telefonica O2 Cz28619.1 Mbps
14.ELDATA prazska s.r.o.2014.8 Mbps
15.Vpsfree Tunnels514.0 Mbps
16.Starnet s.r.o.5312.6 Mbps
17.INTERCONNECT s.r.o.2011.1 Mbps
18.M247 Ltd89.5 Mbps
19.T-Mobile Czech Republic374.9 Mbps
20.Master 1-mai170.0 Mbps
21.Core-Backbone390.0 Mbps
22.NWT Computer60.0 Mbps
23.LajsiNET70.0 Mbps
24.Gts Novera160.0 Mbps
25.Metropolitni sit Humpolec spol. s r.o60.0 Mbps