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. | Hurricane Electric LLC | 144 |
| 2. | Telefonica O2 Cz | 122 |
| 3. | Suntel Net s.r.o. | 98 |
| 4. | O2 Czech Republic | 91 |
| 5. | Metronet | 88 |
| 6. | Upc Czech | 78 |
| 7. | Starnet s.r.o. | 58 |
| 8. | Internet Cz | 54 |
| 9. | brumovice.net | 40 |
| 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.o | 23 |
| 14. | AIRWAYNET, a.s. | 21 |
| 15. | Core-Backbone | 16 |
| 16. | Dial Telecom, a.s. | 15 |
| 17. | Core4Net, s.r.o. | 14 |
| 18. | T-Mobile Czech Republic | 12 |
| 19. | Cesnet6-tcz | 12 |
| 20. | Avonet | 10 |
| 21. | InterneXt 2000, s.r.o. | 10 |
| 22. | Karneval Media | 10 |
| 23. | JMNet | 9 |
| 24. | Liberty Global Operations B.V. | 9 |
| 25. | Gts Novera | 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. | Hurricane Electric LLC | 85 |
| 2. | Telefonica O2 Cz | 70 |
| 3. | Upc Czech | 53 |
| 4. | O2 Czech Republic | 52 |
| 5. | Metronet | 47 |
| 6. | Starnet s.r.o. | 34 |
| 7. | brumovice.net | 26 |
| 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-Backbone | 10 |
| 14. | Internet Cz | 10 |
| 15. | Core4Net, s.r.o. | 10 |
| 16. | Dial Telecom, a.s. | 8 |
| 17. | Cesnet6-tcz | 8 |
| 18. | InterneXt 2000, s.r.o. | 7 |
| 19. | M-wifi internet s.r.o | 7 |
| 20. | Liberty Global Operations B.V. | 6 |
| 21. | Avonet | 6 |
| 22. | OMEGA plus Chrudim s.r.o. | 6 |
| 23. | Gts Novera | 5 |
| 24. | Karneval Media | 5 |
| 25. | JMNet | 5 |
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. | InterneXt 2000, s.r.o. | 10 | 0 | 0.0% | 10 | 100.0% |
| 2. | ABAK network | 5 | 0 | 0.0% | 5 | 100.0% |
| 3. | Cz.fixnet | 8 | 0 | 0.0% | 8 | 100.0% |
| 4. | Seznam.cz, a.s. | 7 | 0 | 0.0% | 7 | 100.0% |
| 5. | M-wifi internet s.r.o | 23 | 0 | 0.0% | 23 | 100.0% |
| 6. | AIRWAYNET, a.s. | 21 | 0 | 0.0% | 21 | 100.0% |
| 7. | Core4Net, s.r.o. | 14 | 0 | 0.0% | 14 | 100.0% |
| 8. | Suntel Net s.r.o. | 98 | 1 | 1.0% | 97 | 99.0% |
| 9. | brumovice.net | 40 | 1 | 2.5% | 39 | 97.5% |
| 10. | Upc Czech | 78 | 4 | 5.1% | 74 | 94.9% |
| 11. | Starnet s.r.o. | 58 | 3 | 5.2% | 55 | 94.8% |
| 12. | Dial Telecom, a.s. | 15 | 1 | 6.7% | 14 | 93.3% |
| 13. | Metronet | 88 | 7 | 8.0% | 81 | 92.0% |
| 14. | Avonet | 10 | 1 | 10.0% | 9 | 90.0% |
| 15. | Gts Novera | 9 | 1 | 11.1% | 8 | 88.9% |
| 16. | JMNet | 9 | 1 | 11.1% | 8 | 88.9% |
| 17. | PODA a.s. | 26 | 3 | 11.5% | 23 | 88.5% |
| 18. | T-Mobile Czech Republic a.s. | 36 | 5 | 13.9% | 31 | 86.1% |
| 19. | O2 Czech Republic | 91 | 13 | 14.3% | 78 | 85.7% |
| 20. | OMEGA plus Chrudim s.r.o. | 7 | 1 | 14.3% | 6 | 85.7% |
| 21. | Cesnet6-tcz | 12 | 2 | 16.7% | 10 | 83.3% |
| 22. | SMART Comp. a.s. | 27 | 5 | 18.5% | 22 | 81.5% |
| 23. | Telefonica O2 Cz | 122 | 26 | 21.3% | 96 | 78.7% |
| 24. | Hurricane Electric LLC | 144 | 35 | 24.3% | 109 | 75.7% |
| 25. | Liberty Global Operations B.V. | 9 | 3 | 33.3% | 6 | 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 | 78 | 288.7 Mbps |
| 2. | Cesnet6-tcz | 12 | 88.4 Mbps |
| 3. | Gts Novera | 9 | 81.5 Mbps |
| 4. | OMEGA plus Chrudim s.r.o. | 7 | 80.1 Mbps |
| 5. | SMART Comp. a.s. | 27 | 76.0 Mbps |
| 6. | NFX network | 8 | 70.0 Mbps |
| 7. | InternetPrahaJosefov | 5 | 68.0 Mbps |
| 8. | Starnet s.r.o. | 58 | 55.8 Mbps |
| 9. | M-wifi internet s.r.o | 23 | 55.7 Mbps |
| 10. | Metronet | 88 | 50.0 Mbps |
| 11. | Liberty Global Operations B.V. | 9 | 49.9 Mbps |
| 12. | INTERCONNECT s.r.o. | 7 | 43.6 Mbps |
| 13. | AIRWAYNET, a.s. | 21 | 39.5 Mbps |
| 14. | Hurricane Electric LLC | 144 | 37.1 Mbps |
| 15. | Telefonica O2 Cz | 122 | 30.1 Mbps |
| 16. | Cz.fixnet | 8 | 28.2 Mbps |
| 17. | PODA a.s. | 26 | 25.9 Mbps |
| 18. | O2 Czech Republic | 91 | 19.9 Mbps |
| 19. | Suntel Net s.r.o. | 98 | 18.6 Mbps |
| 20. | T-Mobile Czech Republic a.s. | 36 | 18.0 Mbps |
| 21. | Internet Cz | 54 | 15.8 Mbps |
| 22. | Avonet | 10 | 14.5 Mbps |
| 23. | ABAK network | 5 | 12.4 Mbps |
| 24. | Karneval Media | 10 | 9.3 Mbps |
| 25. | UPC Ceska republika | 6 | 0.2 Mbps |