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 (Apr 2018)

  ISP IPv6 tests count
1.Hurricane Electric823
2.Telefonica O2 Cz461
3.JMNet336
4.Upc Czech236
5.Starnet s.r.o.187
6.Internet Cz127
7.Sys-datacom I.125
8.T-Mobile Czech Republic106
9.Cesnet6-tcz104
10.Cz.fixnet83
11.Planet A82
12.Poda74
13.Lemo-internet70
14.GTTs57
15.Pe3ny.net41
16.Cdn77 Prg41
17.Eldata40
18.brumovice.net35
19.Netbox32
20.Casablanca INT network30
21.Vutbr629
22.WEDOS Internet28
23.UPC Ceska republika26
24.Gts Novera25
25.GIN's network24

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, Apr 2018)

  ISP Unique IPv6 addresses
1.Hurricane Electric413
2.Telefonica O2 Cz275
3.Upc Czech128
4.Starnet s.r.o.122
5.JMNet118
6.Cesnet6-tcz74
7.T-Mobile Czech Republic64
8.Planet A50
9.Lemo-internet40
10.Sys-datacom I.35
11.GTTs31
12.Poda31
13.Cz.fixnet30
14.Internet Cz28
15.brumovice.net22
16.Pe3ny.net22
17.Netbox22
18.UPC Ceska republika18
19.Casablanca INT network18
20.M247-prague-servers17
21.Cdn77 Prg16
22.Hurricane Electric LLC14
23.Karneval Media14
24.GIN's network12
25.Cz.cznet11

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 (Apr 2018)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.AVAST Software s.r.o800.0%8100.0%
2.Ovanet1300.0%13100.0%
3.Grapesc I700.0%7100.0%
4.Rferl500.0%5100.0%
5.Ovh500.0%5100.0%
6.Cetin1400.0%14100.0%
7.brumovice.net3500.0%35100.0%
8.Narodni bezpecnostni urad800.0%8100.0%
9.Netstone s.r.o.600.0%6100.0%
10.Sprava informacnich technologii mesta Plzne600.0%6100.0%
11.Cdn77 Prg4100.0%41100.0%
12.Metronet900.0%9100.0%
13.UVT Internet800.0%8100.0%
14.Pe3ny.net4112.4%4097.6%
15.Sys-datacom I.12554.0%12096.0%
16.Lemo-internet7034.3%6795.7%
17.Planet A8244.9%7895.1%
18.Telco Pro Services1616.3%1593.8%
19.JMNet336226.5%31493.5%
20.WEDOS Internet2827.1%2692.9%
21.Cz.fixnet8367.2%7792.8%
22.Gts Novera2528.0%2392.0%
23.Airwaynet1218.3%1191.7%
24.NFX network1119.1%1090.9%
25.Starnet s.r.o.187189.6%16990.4%

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 (Apr 2018)

  ISP Test count IPv6 average
1.Narodni bezpecnostni urad8238.8 Mbps
2.Cesnet6-tcz104182.7 Mbps
3.NFX network11106.8 Mbps
4.Upc Czech236103.3 Mbps
5.Lemo-internet7088.2 Mbps
6.Core-Backbone1174.7 Mbps
7.Vutbr62971.8 Mbps
8.Pe3ny.net4161.5 Mbps
9.Poda7450.6 Mbps
10.PilsFree1750.0 Mbps
11.Rosacom540.7 Mbps
12.Planet A8237.5 Mbps
13.Eurosignal635.4 Mbps
14.Ceske Radiokomunikace1131.8 Mbps
15.Sys-datacom I.12529.6 Mbps
16.WEDOS Internet2828.2 Mbps
17.JMNet33626.8 Mbps
18.Interconnect722.5 Mbps
19.Cz.fixnet8322.3 Mbps
20.Netbox3221.8 Mbps
21.Metronet921.5 Mbps
22.Hurricane Electric82321.3 Mbps
23.Telefonica O2 Cz46118.7 Mbps
24.T-Mobile Czech Republic10615.9 Mbps
25.Starnet s.r.o.18715.1 Mbps