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 (Dec 2016)

  ISP IPv6 tests count
1.Hurricane Electric929
2.Telefonica O2 Cz580
3.Cesnet6-tcz77
4.Planet A71
5.T-Mobile Czech Republic64
6.JMNet63
7.Poda58
8.network PVfreenet53
9.Upc Czech50
10.Eldata48
11.UPC Ceska republika41
12.PilsFree40
13.Netbox35
14.Casablanca INT network33
15.Network of Ignum Telekomunikace32
16.WIA s.r.o.31
17.Nextel-xdsl31
18.Starnet s.r.o.27
19.NFX network26
20.Rosacom23
21.Grapesc I23
22.GIN's network22
23.ABAK network22
24.Telco Pro Services20
25.Dragon Internet19

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, Dec 2016)

  ISP Unique IPv6 addresses
1.Hurricane Electric390
2.Telefonica O2 Cz336
3.Cesnet6-tcz52
4.Poda43
5.JMNet42
6.Planet A39
7.T-Mobile Czech Republic38
8.Netbox24
9.UPC Ceska republika21
10.network PVfreenet19
11.Upc Czech17
12.NFX network16
13.GIN's network16
14.Grapesc I12
15.PilsFree12
16.WIA s.r.o.12
17.Cz.cznet12
18.Dattelkabel11
19.Telco Pro Services10
20.Starnet s.r.o.10
21.Network of Ignum Telekomunikace10
22.Rosacom9
23.Casablanca INT network9
24.Vutbr68
25.Interconnect8

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 (Dec 2016)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Master 1-mai1700.0%17100.0%
2.Jaroslav Doubrava1000.0%10100.0%
3.pernix700.0%7100.0%
4.Zoner800.0%8100.0%
5.Avonet500.0%5100.0%
6.KMS Network700.0%7100.0%
7.Gts Novera800.0%8100.0%
8.Grapesc I2300.0%23100.0%
9.Rosacom2300.0%23100.0%
10.JAW.cz500.0%5100.0%
11.network PVfreenet5323.8%5196.2%
12.GIN's network2214.5%2195.5%
13.Starnet s.r.o.2727.4%2592.6%
14.RIPE Network Coordination Centre10110.0%990.0%
15.Cesnet6-tcz771013.0%6787.0%
16.Upc Czech50714.0%4386.0%
17.Internet Cz7114.3%685.7%
18.Network of Coolhousing7114.3%685.7%
19.NFX network26415.4%2284.6%
20.Poda58915.5%4984.5%
21.Empecom12216.7%1083.3%
22.ABAK network22418.2%1881.8%
23.Hurricane Electric92917618.9%75381.1%
24.Telefonica O2 Cz58011419.7%46680.3%
25.Interconnect15320.0%1280.0%

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 (Dec 2016)

  ISP Test count IPv6 average
1.pernix791.9 Mbps
2.JAW.cz556.1 Mbps
3.Planet-A654.4 Mbps
4.Network of Ignum Telekomunikace3247.7 Mbps
5.Avonet542.4 Mbps
6.Upc Czech5041.5 Mbps
7.JMNet6339.1 Mbps
8.Cesnet6-tcz7738.4 Mbps
9.Planet A7134.6 Mbps
10.NFX network2633.9 Mbps
11.Dragon Internet1933.1 Mbps
12.Master 1-mai1733.1 Mbps
13.Poda5830.4 Mbps
14.NetAir network527.0 Mbps
15.Interconnect1526.1 Mbps
16.Rosacom2324.8 Mbps
17.Starnet s.r.o.2724.5 Mbps
18.PilsFree4021.8 Mbps
19.Hurricane Electric92920.8 Mbps
20.ABAK network2220.3 Mbps
21.Karneval Media1319.8 Mbps
22.CD-Telematika616.2 Mbps
23.PorubaNET615.9 Mbps
24.Casablanca INT network3314.9 Mbps
25.GIN's network2213.2 Mbps