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 2018)

  ISP IPv6 tests count
1.Hurricane Electric559
2.Telefonica O2 Cz533
3.JMNet281
4.Internet Cz252
5.Hurricane Electric LLC212
6.Upc Czech202
7.Starnet s.r.o.138
8.Cesnet6-tcz135
9.T-Mobile Czech Republic133
10.PODA a.s.95
11.Core-Backbone82
12.Planet A70
13.Sys-datacom I63
14.Interconnect61
15.GTTs58
16.GIN's network52
17.Casablanca INT network51
18.Rosacom49
19.Lemo-internet47
20.Vutbr643
21.Karneval Media42
22.M247 Ltd31
23.PorubaNET25
24.Sys-datacom I.24
25.Netbox23

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 2018)

  ISP Unique IPv6 addresses
1.Telefonica O2 Cz330
2.Hurricane Electric313
3.Hurricane Electric LLC113
4.JMNet112
5.Upc Czech101
6.Starnet s.r.o.94
7.Cesnet6-tcz82
8.T-Mobile Czech Republic74
9.Planet A46
10.PODA a.s.38
11.Lemo-internet37
12.Internet Cz34
13.Interconnect33
14.GTTs30
15.GIN's network25
16.Karneval Media22
17.M247 Ltd19
18.Casablanca INT network19
19.Sys-datacom I18
20.Netbox17
21.brumovice.net15
22.Grapesc I14
23.Vutbr614
24.Pe3ny.net13
25.Vpsfree Tunnels13

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 2018)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.suas.cz500.0%5100.0%
2.Lemo-internet4700.0%47100.0%
3.Ovanet800.0%8100.0%
4.Zoner500.0%5100.0%
5.JHComp network1000.0%10100.0%
6.AVAST Software s.r.o800.0%8100.0%
7.Dial Telecom1300.0%13100.0%
8.Metronet800.0%8100.0%
9.WIA spol. s.r.o.700.0%7100.0%
10.Pernstejn.net1200.0%12100.0%
11.Spoje.Net s.r.o1000.0%10100.0%
12.SitePark s.r.o.1800.0%18100.0%
13.pernix500.0%5100.0%
14.Rosacom4900.0%49100.0%
15.Hosting90500.0%5100.0%
16.Sys-datacom I6311.6%6298.4%
17.JMNet28172.5%27497.5%
18.M247 Ltd3113.2%3096.8%
19.Sys-datacom I.2414.2%2395.8%
20.Planet A7034.3%6795.7%
21.brumovice.net2214.5%2195.5%
22.Interconnect6134.9%5895.1%
23.Grapesc I1915.3%1894.7%
24.Gts Novera1715.9%1694.1%
25.Network of Coolhousing1715.9%1694.1%

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 2018)

  ISP Test count IPv6 average
1.Cesnet6-tcz135148.3 Mbps
2.UVT Internet7136.1 Mbps
3.Upc Czech202131.4 Mbps
4.Grapesc I19127.9 Mbps
5.NFX network9100.0 Mbps
6.Pe3ny.net2268.7 Mbps
7.SitePark s.r.o.1862.6 Mbps
8.Planet A7050.5 Mbps
9.Vutbr64347.2 Mbps
10.PODA a.s.9537.4 Mbps
11.Spoje.Net s.r.o1035.5 Mbps
12.Rosacom4932.8 Mbps
13.Sys-datacom I.2431.6 Mbps
14.Eurosignal828.6 Mbps
15.ABAK network1928.2 Mbps
16.JMNet28125.5 Mbps
17.Metronet821.4 Mbps
18.Master 1-mai720.7 Mbps
19.Hurricane Electric55919.6 Mbps
20.JHComp network1018.9 Mbps
21.GIN's network5218.0 Mbps
22.Telefonica O2 Cz53316.7 Mbps
23.T-Mobile Czech Republic13315.0 Mbps
24.Vpsfree Tunnels2013.7 Mbps
25.Hurricane Electric LLC21212.5 Mbps