IPv6 in Czech RepublicThese 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.
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.
| ISP | IPv6 tests count | |
|---|---|---|
| 1. | Telefonica O2 Cz | 230 |
| 2. | Hurricane Electric LLC | 109 |
| 3. | Core-Backbone | 67 |
| 4. | TaNET West s.r.o. | 41 |
| 5. | T-Mobile Czech Republic a.s. | 35 |
| 6. | Upc Czech | 34 |
| 7. | Cesnet6-tcz | 29 |
| 8. | brumovice.net | 27 |
| 9. | Metronet | 24 |
| 10. | ELDATA prazska s.r.o. | 23 |
| 11. | SMART Comp. a.s. | 22 |
| 12. | M247 Ltd | 21 |
| 13. | UVT Internet | 18 |
| 14. | Internet Cz | 18 |
| 15. | INTERCONNECT s.r.o. | 16 |
| 16. | PODA a.s. | 16 |
| 17. | Master | 14 |
| 18. | GTTs | 14 |
| 19. | Avonet | 14 |
| 20. | Casablanca INT network | 14 |
| 21. | Core4Net, s.r.o. | 12 |
| 22. | Suntel Net s.r.o. | 11 |
| 23. | Karneval Media | 9 |
| 24. | Starnet s.r.o. | 9 |
| 25. | WEDOS Internet | 9 |
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.
| ISP | Unique IPv6 addresses | |
|---|---|---|
| 1. | Telefonica O2 Cz | 117 |
| 2. | Hurricane Electric LLC | 57 |
| 3. | T-Mobile Czech Republic a.s. | 29 |
| 4. | brumovice.net | 22 |
| 5. | Upc Czech | 19 |
| 6. | SMART Comp. a.s. | 18 |
| 7. | TaNET West s.r.o. | 15 |
| 8. | Avonet | 13 |
| 9. | Core-Backbone | 12 |
| 10. | UVT Internet | 10 |
| 11. | Internet Cz | 10 |
| 12. | Metronet | 10 |
| 13. | M247 Ltd | 9 |
| 14. | Core4Net, s.r.o. | 8 |
| 15. | Suntel Net s.r.o. | 7 |
| 16. | PODA a.s. | 7 |
| 17. | Starnet s.r.o. | 6 |
| 18. | INTERCONNECT s.r.o. | 6 |
| 19. | Karneval Media | 6 |
| 20. | Hurricane Electric | 5 |
| 21. | T-2 d.o.o | 5 |
| 22. | Ceske Radiokomunikace | 5 |
| 23. | ELDATA prazska s.r.o. | 5 |
| 24. | WIA spol. s r.o. | 5 |
| 25. | Cesnet6-tcz | 4 |
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.
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.
| ISP | Test count | IPv4 | IPv4 % | IPv6 | IPv6 % | |
|---|---|---|---|---|---|---|
| 1. | UVT Internet | 18 | 0 | 0.0% | 18 | 100.0% |
| 2. | Core4Net, s.r.o. | 12 | 0 | 0.0% | 12 | 100.0% |
| 3. | INTERCONNECT s.r.o. | 16 | 0 | 0.0% | 16 | 100.0% |
| 4. | VIVO CONNECTION spol. s r.o. | 7 | 0 | 0.0% | 7 | 100.0% |
| 5. | Casablanca INT network | 14 | 0 | 0.0% | 14 | 100.0% |
| 6. | T-2 d.o.o | 6 | 0 | 0.0% | 6 | 100.0% |
| 7. | MetroHU | 5 | 0 | 0.0% | 5 | 100.0% |
| 8. | brumovice.net | 27 | 0 | 0.0% | 27 | 100.0% |
| 9. | Hurricane Electric | 5 | 0 | 0.0% | 5 | 100.0% |
| 10. | Metronet | 24 | 0 | 0.0% | 24 | 100.0% |
| 11. | Gts Novera | 7 | 0 | 0.0% | 7 | 100.0% |
| 12. | T-Mobile Czech Republic a.s. | 35 | 2 | 5.7% | 33 | 94.3% |
| 13. | Avonet | 14 | 1 | 7.1% | 13 | 92.9% |
| 14. | Cesnet6-tcz | 29 | 3 | 10.3% | 26 | 89.7% |
| 15. | Starnet s.r.o. | 9 | 1 | 11.1% | 8 | 88.9% |
| 16. | Upc Czech | 34 | 4 | 11.8% | 30 | 88.2% |
| 17. | Telefonica O2 Cz | 230 | 37 | 16.1% | 193 | 83.9% |
| 18. | Ceske Radiokomunikace | 6 | 1 | 16.7% | 5 | 83.3% |
| 19. | PODA a.s. | 16 | 3 | 18.8% | 13 | 81.3% |
| 20. | WIA spol. s r.o. | 5 | 1 | 20.0% | 4 | 80.0% |
| 21. | Internet Expert s.r.o. | 5 | 1 | 20.0% | 4 | 80.0% |
| 22. | TaNET West s.r.o. | 41 | 10 | 24.4% | 31 | 75.6% |
| 23. | Hurricane Electric LLC | 109 | 27 | 24.8% | 82 | 75.2% |
| 24. | WEDOS Internet | 9 | 3 | 33.3% | 6 | 66.7% |
| 25. | Internet Cz | 18 | 6 | 33.3% | 12 | 66.7% |
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.
| ISP | Test count | IPv6 average | |
|---|---|---|---|
| 1. | Upc Czech | 34 | 56.4 Mbps |
| 2. | PODA a.s. | 16 | 45.0 Mbps |
| 3. | Metronet | 24 | 35.6 Mbps |
| 4. | Starnet s.r.o. | 9 | 35.1 Mbps |
| 5. | SMART Comp. a.s. | 22 | 33.9 Mbps |
| 6. | Gts Novera | 7 | 28.1 Mbps |
| 7. | UVT Internet | 18 | 23.4 Mbps |
| 8. | Hurricane Electric LLC | 109 | 22.2 Mbps |
| 9. | M247 Ltd | 21 | 20.2 Mbps |
| 10. | Telefonica O2 Cz | 230 | 19.7 Mbps |
| 11. | INTERCONNECT s.r.o. | 16 | 18.6 Mbps |
| 12. | ELDATA prazska s.r.o. | 23 | 16.1 Mbps |
| 13. | Internet Cz | 18 | 16.0 Mbps |
| 14. | T-Mobile Czech Republic a.s. | 35 | 12.7 Mbps |
| 15. | Cesnet6-tcz | 29 | 5.8 Mbps |
| 16. | WIA spol. s r.o. | 5 | 5.3 Mbps |
| 17. | Avonet | 14 | 0.8 Mbps |
| 18. | VIVO CONNECTION spol. s r.o. | 7 | 0.0 Mbps |
| 19. | T-2 d.o.o | 6 | 0.0 Mbps |
| 20. | brumovice.net | 27 | 0.0 Mbps |
| 21. | TaNET West s.r.o. | 41 | 0.0 Mbps |
| 22. | Hurricane Electric | 5 | 0.0 Mbps |
| 23. | WEDOS Internet | 9 | 0.0 Mbps |
| 24. | Casablanca INT network | 14 | 0.0 Mbps |
| 25. | Internet Expert s.r.o. | 5 | 0.0 Mbps |