IPv6 test - Statistics for 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 (Aug 2020)

	ISP	IPv6 tests count
1.	Starnet s.r.o.	145
2.	Hurricane Electric LLC	120
3.	Telefonica O2 Cz	112
4.	Telco Pro Services, a. s.	61
5.	Core-Backbone	46
6.	Upc Czech	44
7.	brumovice.net	39
8.	Cesnet6-tcz	37
9.	Metronet	32
10.	PODA a.s.	30
11.	T-Mobile Czech Republic a.s.	30
12.	Internet Cz	18
13.	SMART Comp. a.s.	17
14.	Core4Net, s.r.o.	17
15.	Suntel Net s.r.o.	16
16.	Avonet	10
17.	UVT Internet	9
18.	M247 Ltd	9
19.	RIPE Network Coordination Center	8
20.	Vutbr6	8
21.	AIRWAYNET, a.s.	7
22.	Amigonet	7
23.	WIA spol. s r.o.	7
24.	Casablanca INT network	7
25.	Ceska Telekomunikacni Infrastruktura a.s	5

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, Aug 2020)

	ISP	Unique IPv6 addresses
1.	Starnet s.r.o.	74
2.	Hurricane Electric LLC	52
3.	Telefonica O2 Cz	51
4.	Upc Czech	25
5.	brumovice.net	24
6.	T-Mobile Czech Republic a.s.	21
7.	Metronet	20
8.	PODA a.s.	14
9.	Cesnet6-tcz	14
10.	SMART Comp. a.s.	12
11.	Core-Backbone	11
12.	Avonet	9
13.	Telco Pro Services, a. s.	8
14.	UVT Internet	8
15.	Core4Net, s.r.o.	7
16.	Suntel Net s.r.o.	7
17.	Amigonet	7
18.	RIPE Network Coordination Center	7
19.	Internet Cz	5
20.	AIRWAYNET, a.s.	5
21.	Casablanca INT network	4
22.	WIA spol. s r.o.	3
23.	KME, spol. s r. o.	3
24.	Vutbr6	3
25.	Ceska Telekomunikacni Infrastruktura a.s	2

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 (Aug 2020)

	ISP	Test count	IPv4	IPv4 %	IPv6	IPv6 %
1.	Suntel Net s.r.o.	16	0	0.0%	16	100.0%
2.	Warnet.cz	5	0	0.0%	5	100.0%
3.	KME, spol. s r. o.	5	0	0.0%	5	100.0%
4.	WIA spol. s r.o.	7	0	0.0%	7	100.0%
5.	Telco Pro Services, a. s.	61	0	0.0%	61	100.0%
6.	Core4Net, s.r.o.	17	0	0.0%	17	100.0%
7.	Metronet	32	0	0.0%	32	100.0%
8.	Vutbr6	8	0	0.0%	8	100.0%
9.	AIRWAYNET, a.s.	7	0	0.0%	7	100.0%
10.	Casablanca INT network	7	0	0.0%	7	100.0%
11.	brumovice.net	39	0	0.0%	39	100.0%
12.	INTERCONNECT s.r.o.	5	0	0.0%	5	100.0%
13.	Ceska Telekomunikacni Infrastruktura a.s	5	0	0.0%	5	100.0%
14.	RIPE Network Coordination Center	8	0	0.0%	8	100.0%
15.	Starnet s.r.o.	145	0	0.0%	145	100.0%
16.	Upc Czech	44	3	6.8%	41	93.2%
17.	Hurricane Electric LLC	120	12	10.0%	108	90.0%
18.	UVT Internet	9	1	11.1%	8	88.9%
19.	Amigonet	7	1	14.3%	6	85.7%
20.	Telefonica O2 Cz	112	21	18.8%	91	81.3%
21.	Cesnet6-tcz	37	7	18.9%	30	81.1%
22.	Avonet	10	2	20.0%	8	80.0%
23.	T-Mobile Czech Republic a.s.	30	8	26.7%	22	73.3%
24.	PODA a.s.	30	10	33.3%	20	66.7%
25.	SMART Comp. a.s.	17	6	35.3%	11	64.7%

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 (Aug 2020)

	ISP	Test count	IPv6 average
1.	PODA a.s.	30	88.2 Mbps
2.	KME, spol. s r. o.	5	82.6 Mbps
3.	Avonet	10	77.0 Mbps
4.	Cesnet6-tcz	37	74.1 Mbps
5.	Warnet.cz	5	68.5 Mbps
6.	UVT Internet	9	67.8 Mbps
7.	SMART Comp. a.s.	17	62.6 Mbps
8.	Hurricane Electric LLC	120	41.0 Mbps
9.	Vutbr6	8	35.1 Mbps
10.	Core4Net, s.r.o.	17	32.4 Mbps
11.	WIA spol. s r.o.	7	32.1 Mbps
12.	Upc Czech	44	28.6 Mbps
13.	AIRWAYNET, a.s.	7	23.7 Mbps
14.	Telefonica O2 Cz	112	22.0 Mbps
15.	Starnet s.r.o.	145	20.4 Mbps
16.	Metronet	32	15.4 Mbps
17.	T-Mobile Czech Republic a.s.	30	12.4 Mbps
18.	FASTER CZ spol. s r.o.	5	0.4 Mbps
19.	Telco Pro Services, a. s.	61	0.0 Mbps
20.	Core-Backbone	46	0.0 Mbps
21.	Internet Cz	18	0.0 Mbps
22.	brumovice.net	39	0.0 Mbps
23.	Casablanca INT network	7	0.0 Mbps
24.	Amigonet	7	0.0 Mbps
25.	M247 Ltd	9	0.0 Mbps