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 2017)

  ISP IPv6 tests count
1.Hurricane Electric1,223
2.Telefonica O2 Cz587
3.Starnet s.r.o.275
4.Upc Czech182
5.Planet A154
6.JMNet145
7.Poda117
8.Cesnet6-tcz110
9.ABAK network102
10.Jaroslav Doubrava95
11.Eldata85
12.Dial Telecom79
13.Casablanca INT network70
14.T-Mobile Czech Republic54
15.GTTs53
16.UPC Ceska republika32
17.GIN's network31
18.M247-prague-servers25
19.Ovanet25
20.Grapesc I24
21.NFX network22
22.Vutbr621
23.Dattelkabel21
24.Telco Pro Services19
25.Gts Novera19

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 2017)

  ISP Unique IPv6 addresses
1.Hurricane Electric549
2.Telefonica O2 Cz321
3.Planet A91
4.JMNet76
5.Upc Czech70
6.Poda65
7.Starnet s.r.o.65
8.Cesnet6-tcz37
9.GTTs36
10.T-Mobile Czech Republic34
11.Jaroslav Doubrava32
12.Dial Telecom27
13.ABAK network26
14.GIN's network19
15.UPC Ceska republika18
16.NFX network17
17.Casablanca INT network17
18.Grapesc I16
19.Vutbr615
20.Karneval Media12
21.Ovanet12
22.Telco Pro Services10
23.Netbox9
24.NWT Computer9
25.Network of Ignum Telekomunikace9

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 2017)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.FELDSAM s.r.o.1000.0%10100.0%
2.RIPE Network Coordination Centre800.0%8100.0%
3.Grapesc I2400.0%24100.0%
4.Sky Broadband500.0%5100.0%
5.Comcast Cable Communications500.0%5100.0%
6.GTTs5300.0%53100.0%
7.Freenet Liberec900.0%9100.0%
8.InternalSpace101600.0%6100.0%
9.Pojistovna Ceske sporitelny600.0%6100.0%
10.JAW.cz800.0%8100.0%
11.Master 1-mai500.0%5100.0%
12.MORNET-CZ Campis1000.0%10100.0%
13.Time Warner Cable Internet LLC600.0%6100.0%
14.Vshosting600.0%6100.0%
15.Starnet s.r.o.275114.0%26496.0%
16.JMNet145106.9%13593.1%
17.Spoje.Net s.r.o.1317.7%1292.3%
18.Ovanet2528.0%2392.0%
19.Cesnet6-tcz11098.2%10191.8%
20.Vutbr62129.5%1990.5%
21.Planet A154159.7%13990.3%
22.Telco Pro Services19210.5%1789.5%
23.NWT Computer17211.8%1588.2%
24.NetAir network8112.5%787.5%
25.WEDOS Internet7114.3%685.7%

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 2017)

  ISP Test count IPv6 average
1.Vshosting6407.4 Mbps
2.JAW.cz8124.9 Mbps
3.FELDSAM s.r.o.10106.1 Mbps
4.Cesnet6-tcz11073.7 Mbps
5.InternalSpace101670.3 Mbps
6.NetAir network864.9 Mbps
7.Ceske Radiokomunikace1844.5 Mbps
8.Planet A15441.9 Mbps
9.Karneval Media1738.1 Mbps
10.Eurosignal637.2 Mbps
11.CD-Telematika631.5 Mbps
12.NFX network2225.5 Mbps
13.Dial Telecom7925.0 Mbps
14.UPC Ceska republika3220.8 Mbps
15.JMNet14520.4 Mbps
16.ABAK network10220.4 Mbps
17.Amccomp619.2 Mbps
18.Hurricane Electric1,22319.1 Mbps
19.Starnet s.r.o.27517.7 Mbps
20.Poda11717.2 Mbps
21.Vutbr62116.9 Mbps
22.Internet Cz1413.0 Mbps
23.Telefonica O2 Cz58712.9 Mbps
24.Airwaynet1612.9 Mbps
25.Network of Ignum Telekomunikace1112.3 Mbps