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 2020)

  ISP IPv6 tests count
1.Hurricane Electric LLC348
2.Starnet s.r.o.347
3.UVT Internet260
4.Metronet121
5.Telefonica O2 Cz100
6.PODA a.s.61
7.Core-Backbone46
8.Upc Czech40
9.SMART Comp. a.s.39
10.T-Mobile Czech Republic a.s.31
11.Internet Cz22
12.brumovice.net22
13.Avonet21
14.Vpsfree Tunnels21
15.AIRWAYNET, a.s.19
16.InterneXt 2000, s.r.o.19
17.Paskov18
18.Cesnet6-tcz17
19.Amigonet15
20.Telco Pro Services, a. s.12
21.Karneval Media11
22.Suntel Net s.r.o.10
23.JMNet9
24.Core4Net, s.r.o.8
25.Network of Coolhousing7

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 2020)

  ISP Unique IPv6 addresses
1.Hurricane Electric LLC146
2.Starnet s.r.o.97
3.UVT Internet80
4.Metronet55
5.Telefonica O2 Cz54
6.PODA a.s.39
7.Upc Czech28
8.SMART Comp. a.s.24
9.T-Mobile Czech Republic a.s.21
10.brumovice.net19
11.InterneXt 2000, s.r.o.18
12.Paskov13
13.Core-Backbone11
14.Amigonet11
15.Karneval Media10
16.AIRWAYNET, a.s.9
17.Cesnet6-tcz9
18.Vpsfree Tunnels8
19.Network of Coolhousing6
20.Suntel Net s.r.o.6
21.Core4Net, s.r.o.6
22.Avonet6
23.Telco Pro Services, a. s.6
24.Internet Cz5
25.JMNet5

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 2020)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.P4ISP z.s.p.o. network500.0%5100.0%
2.JMNet900.0%9100.0%
3.Telco Pro Services, a. s.1200.0%12100.0%
4.Avonet2100.0%21100.0%
5.Amigonet1500.0%15100.0%
6.InterneXt 2000, s.r.o.1900.0%19100.0%
7.Suntel Net s.r.o.1000.0%10100.0%
8.brumovice.net2200.0%22100.0%
9.Core4Net, s.r.o.800.0%8100.0%
10.Cesnet6-tcz1700.0%17100.0%
11.Grapesc I500.0%5100.0%
12.Metronet12100.0%121100.0%
13.Starnet s.r.o.34741.2%34398.8%
14.Upc Czech4012.5%3997.5%
15.T-Mobile Czech Republic a.s.3113.2%3096.8%
16.Vpsfree Tunnels2114.8%2095.2%
17.UVT Internet260218.1%23991.9%
18.PODA a.s.6158.2%5691.8%
19.Telefonica O2 Cz1001515.0%8585.0%
20.Hurricane Electric LLC3485315.2%29584.8%
21.AIRWAYNET, a.s.19315.8%1684.2%
22.Sys-datacom I6116.7%583.3%
23.SMART Comp. a.s.391435.9%2564.1%
24.M247 Ltd5240.0%360.0%
25.Network of Coolhousing7342.9%457.1%

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 2020)

  ISP Test count IPv6 average
1.Telco Pro Services, a. s.1289.0 Mbps
2.InterneXt 2000, s.r.o.1987.7 Mbps
3.AIRWAYNET, a.s.1986.1 Mbps
4.UVT Internet26069.1 Mbps
5.Upc Czech4068.2 Mbps
6.JMNet959.5 Mbps
7.Suntel Net s.r.o.1051.3 Mbps
8.SMART Comp. a.s.3949.4 Mbps
9.PODA a.s.6147.2 Mbps
10.Starnet s.r.o.34739.0 Mbps
11.Amigonet1538.6 Mbps
12.Hurricane Electric LLC34837.3 Mbps
13.Telefonica O2 Cz10032.4 Mbps
14.Sys-datacom 7.528.0 Mbps
15.T-Mobile Czech Republic a.s.3125.7 Mbps
16.Network of Coolhousing719.2 Mbps
17.Vpsfree Tunnels2118.9 Mbps
18.Metronet12113.8 Mbps
19.Cesnet6-tcz177.3 Mbps
20.Karneval Media114.3 Mbps
21.Sys-datacom I61.9 Mbps
22.Paskov180.0 Mbps
23.Internet Cz220.0 Mbps
24.M247 Ltd50.0 Mbps
25.Core-Backbone460.0 Mbps