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 (Oct 2020)

  ISP IPv6 tests count
1.Hurricane Electric LLC144
2.Telefonica O2 Cz122
3.Suntel Net s.r.o.98
4.O2 Czech Republic91
5.Metronet88
6.Upc Czech78
7.Starnet s.r.o.58
8.Internet Cz54
9.brumovice.net40
10.T-Mobile Czech Republic a.s.36
11.SMART Comp. a.s.27
12.PODA a.s.26
13.M-wifi internet s.r.o23
14.AIRWAYNET, a.s.21
15.Core-Backbone16
16.Dial Telecom, a.s.15
17.Core4Net, s.r.o.14
18.T-Mobile Czech Republic12
19.Cesnet6-tcz12
20.Avonet10
21.InterneXt 2000, s.r.o.10
22.Karneval Media10
23.JMNet9
24.Liberty Global Operations B.V.9
25.Gts Novera9

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, Oct 2020)

  ISP Unique IPv6 addresses
1.Hurricane Electric LLC85
2.Telefonica O2 Cz70
3.Upc Czech53
4.O2 Czech Republic52
5.Metronet47
6.Starnet s.r.o.34
7.brumovice.net26
8.T-Mobile Czech Republic a.s.26
9.Suntel Net s.r.o.20
10.SMART Comp. a.s.17
11.PODA a.s.15
12.AIRWAYNET, a.s.13
13.Core-Backbone10
14.Internet Cz10
15.Core4Net, s.r.o.10
16.Dial Telecom, a.s.8
17.Cesnet6-tcz8
18.InterneXt 2000, s.r.o.7
19.M-wifi internet s.r.o7
20.Liberty Global Operations B.V.6
21.Avonet6
22.OMEGA plus Chrudim s.r.o.6
23.Gts Novera5
24.Karneval Media5
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 (Oct 2020)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.InterneXt 2000, s.r.o.1000.0%10100.0%
2.ABAK network500.0%5100.0%
3.Cz.fixnet800.0%8100.0%
4.Seznam.cz, a.s.700.0%7100.0%
5.M-wifi internet s.r.o2300.0%23100.0%
6.AIRWAYNET, a.s.2100.0%21100.0%
7.Core4Net, s.r.o.1400.0%14100.0%
8.Suntel Net s.r.o.9811.0%9799.0%
9.brumovice.net4012.5%3997.5%
10.Upc Czech7845.1%7494.9%
11.Starnet s.r.o.5835.2%5594.8%
12.Dial Telecom, a.s.1516.7%1493.3%
13.Metronet8878.0%8192.0%
14.Avonet10110.0%990.0%
15.Gts Novera9111.1%888.9%
16.JMNet9111.1%888.9%
17.PODA a.s.26311.5%2388.5%
18.T-Mobile Czech Republic a.s.36513.9%3186.1%
19.O2 Czech Republic911314.3%7885.7%
20.OMEGA plus Chrudim s.r.o.7114.3%685.7%
21.Cesnet6-tcz12216.7%1083.3%
22.SMART Comp. a.s.27518.5%2281.5%
23.Telefonica O2 Cz1222621.3%9678.7%
24.Hurricane Electric LLC1443524.3%10975.7%
25.Liberty Global Operations B.V.9333.3%666.7%

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 (Oct 2020)

  ISP Test count IPv6 average
1.Upc Czech78288.7 Mbps
2.Cesnet6-tcz1288.4 Mbps
3.Gts Novera981.5 Mbps
4.OMEGA plus Chrudim s.r.o.780.1 Mbps
5.SMART Comp. a.s.2776.0 Mbps
6.NFX network870.0 Mbps
7.InternetPrahaJosefov568.0 Mbps
8.Starnet s.r.o.5855.8 Mbps
9.M-wifi internet s.r.o2355.7 Mbps
10.Metronet8850.0 Mbps
11.Liberty Global Operations B.V.949.9 Mbps
12.INTERCONNECT s.r.o.743.6 Mbps
13.AIRWAYNET, a.s.2139.5 Mbps
14.Hurricane Electric LLC14437.1 Mbps
15.Telefonica O2 Cz12230.1 Mbps
16.Cz.fixnet828.2 Mbps
17.PODA a.s.2625.9 Mbps
18.O2 Czech Republic9119.9 Mbps
19.Suntel Net s.r.o.9818.6 Mbps
20.T-Mobile Czech Republic a.s.3618.0 Mbps
21.Internet Cz5415.8 Mbps
22.Avonet1014.5 Mbps
23.ABAK network512.4 Mbps
24.Karneval Media109.3 Mbps
25.UPC Ceska republika60.2 Mbps