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 (Feb 2023)

  ISP IPv6 tests count
1.O2 Czech Republic275
2.Vodafone Czech Republic a.s.149
3.METRONET s.r.o.111
4.T-Mobile Czech Republic a.s.90
5.STARNET, s.r.o.84
6.Hurricane Electric LLC45
7.WEDOS Internet38
8.brumovice.net37
9.Cloudflare, Inc.32
10.SMART Comp. a.s.28
11.UVT Internet s.r.o.28
12.AVONET, s.r.o.27
13.Paskov26
14.PODA a.s.26
15.Nej.cz s.r.o25
16.Pe3ny Net s.r.o.19
17.SpaceX Starlink17
18.Master Internet s.r.o.13
19.JM-Net, z.s.13
20.WIA spol. s r.o13
21.SPCom s.r.o.11
22.SychrovNET s.r.o11
23.Sys-datacom I11
24.Akamai Technologies, Inc.10
25.INTERCONNECT s.r.o.9

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, Feb 2023)

  ISP Unique IPv6 addresses
1.O2 Czech Republic139
2.Vodafone Czech Republic a.s.57
3.T-Mobile Czech Republic a.s.51
4.METRONET s.r.o.50
5.STARNET, s.r.o.38
6.Hurricane Electric LLC30
7.brumovice.net28
8.Cloudflare, Inc.15
9.Paskov12
10.SMART Comp. a.s.12
11.UVT Internet s.r.o.11
12.PODA a.s.11
13.SychrovNET s.r.o9
14.Akamai Technologies, Inc.8
15.Pe3ny Net s.r.o.8
16.Core4Net, s.r.o.8
17.Vodafone Czech Republic8
18.JM-Net, z.s.7
19.INTERCONNECT s.r.o.7
20.SpaceX Starlink7
21.Master Internet s.r.o.6
22.AVONET, s.r.o.5
23.Nej.cz s.r.o5
24.Sys-datacom I5
25.ABAK network5

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.

@AD_CODE@

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 (Feb 2023)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.SilesNet Network700.0%7100.0%
2.Sys-datacom I1100.0%11100.0%
3.Core4Net, s.r.o.9111.1%888.9%
4.Master Internet s.r.o.13215.4%1184.6%
5.WIA spol. s r.o13215.4%1184.6%
6.a-net Liberec s.r.o.6116.7%583.3%
7.Grapesc I6116.7%583.3%
8.SpaceX Starlink17317.6%1482.4%
9.UVT Internet s.r.o.28517.9%2382.1%
10.O2 Czech Republic2755520.0%22080.0%
11.INTERCONNECT s.r.o.9222.2%777.8%
12.ABAK network8225.0%675.0%
13.AVONET, s.r.o.27725.9%2074.1%
14.Cloudflare, Inc.32928.1%2371.9%
15.METRONET s.r.o.1113228.8%7971.2%
16.Paskov26830.8%1869.2%
17.STARNET, s.r.o.842631.0%5869.0%
18.brumovice.net371232.4%2567.6%
19.Hurricane Electric LLC451533.3%3066.7%
20.PODA a.s.26934.6%1765.4%
21.T-Mobile Czech Republic a.s.903235.6%5864.4%
22.SMART Comp. a.s.281035.7%1864.3%
23.SychrovNET s.r.o11436.4%763.6%
24.WIA spol. s r.o.8337.5%562.5%
25.Vodafone Czech Republic a.s.1495738.3%9261.7%

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 (Feb 2023)

  ISP Test count IPv6 average
1.Akamai Technologies, Inc.10135.4 Mbps
2.Paskov26112.4 Mbps
3.Vodafone Czech Republic a.s.149109.6 Mbps
4.SpaceX Starlink17106.5 Mbps
5.METRONET s.r.o.111106.1 Mbps
6.SychrovNET s.r.o1184.5 Mbps
7.Pe3ny Net s.r.o.1982.2 Mbps
8.WEDOS Internet3881.6 Mbps
9.INTERCONNECT s.r.o.980.9 Mbps
10.Cloudflare, Inc.3265.7 Mbps
11.T-Mobile Czech Republic a.s.9062.6 Mbps
12.Master Internet s.r.o.1345.4 Mbps
13.ABAK network837.5 Mbps
14.SPCom s.r.o.1134.6 Mbps
15.O2 Czech Republic27529.9 Mbps
16.PODA a.s.2624.8 Mbps
17.SMART Comp. a.s.2823.5 Mbps
18.UVT Internet s.r.o.2819.3 Mbps
19.STARNET, s.r.o.8417.4 Mbps
20.Hurricane Electric LLC4514.3 Mbps
21.Nej.cz s.r.o251.5 Mbps
22.a-net Liberec s.r.o.60.0 Mbps
23.Hana Juzkova70.0 Mbps
24.AVONET, s.r.o.270.0 Mbps
25.Vodafone Czech Republic80.0 Mbps
@AD_CODE@