6 vs. 4 history
These graphs show the evolution of default protocol, v6 address types, and average bandwidth over time. They are generated using the data collected by tens of thousands of tests that are done monthly at the ipv6-test.com connection test page, and are updated on a monthly basis.
Overall IPv6 and v4 protocol support
The graph below 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 countries for IPv6 support (Apr 2013)
| Country | Test count | IPv4 | IPv4 % | IPv6 | IPv6 % | |
|---|---|---|---|---|---|---|
| 1. |  Liechtenstein | 12 | 12 | 100.0% | 11 | 91.7% |
| 2. |  Slovenia | 516 | 508 | 98.4% | 389 | 75.4% |
| 3. |  United States | 73,578 | 59,013 | 80.2% | 51,494 | 70.0% |
| 4. |  Pakistan | 319 | 313 | 98.1% | 196 | 61.4% |
| 5. |  Macedonia | 139 | 138 | 99.3% | 84 | 60.4% |
| 6. |  Hong Kong | 1,008 | 986 | 97.8% | 568 | 56.3% |
| 7. |  Canada | 3,230 | 3,032 | 93.9% | 1,807 | 55.9% |
| 8. |  Japan | 7,349 | 7,252 | 98.7% | 4,079 | 55.5% |
| 9. |  Haiti | 11 | 11 | 100.0% | 6 | 54.5% |
| 10. |  Taiwan | 2,822 | 2,758 | 97.7% | 1,529 | 54.2% |
| 11. |  Norway | 853 | 842 | 98.7% | 455 | 53.3% |
| 12. |  Nepal | 17 | 17 | 100.0% | 9 | 52.9% |
| 13. |  Germany | 12,228 | 11,880 | 97.2% | 6,350 | 51.9% |
| 14. |  Netherlands | 5,826 | 5,650 | 97.0% | 3,010 | 51.7% |
| 15. |  Switzerland | 2,363 | 2,304 | 97.5% | 1,201 | 50.8% |
| 16. |  Monaco | 12 | 12 | 100.0% | 6 | 50.0% |
| 17. |  Portugal | 861 | 803 | 93.3% | 427 | 49.6% |
| 18. |  Viet Nam | 447 | 413 | 92.4% | 219 | 49.0% |
| 19. |  New Zealand | 458 | 451 | 98.5% | 224 | 48.9% |
| 20. |  Belgium | 1,599 | 1,573 | 98.4% | 762 | 47.7% |
| 21. |  Greece | 647 | 641 | 99.1% | 306 | 47.3% |
| 22. |  China | 3,599 | 3,486 | 96.9% | 1,692 | 47.0% |
| 23. |  Moldova | 177 | 177 | 100.0% | 83 | 46.9% |
| 24. |  Bahrain | 15 | 15 | 100.0% | 7 | 46.7% |
| 25. |  United Kingdom | 4,483 | 4,425 | 98.7% | 2,088 | 46.6% |
IPv6 and v4 protocol support (unique addresses)
The graph below 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 countries for IPv6 support (unique addresses, Apr 2013)
| Country | Test count | IPv4 | IPv4 % | IPv6 | IPv6 % | |
|---|---|---|---|---|---|---|
| 1. | Slovenia | 516 | 115 | 30.9% | 257 | 69.1% |
| 2. | Macedonia | 139 | 30 | 37.5% | 50 | 62.5% |
| 3. | Norway | 853 | 226 | 47.8% | 247 | 52.2% |
| 4. | Switzerland | 2,363 | 681 | 49.2% | 703 | 50.8% |
| 5. | Netherlands | 5,826 | 1,603 | 50.2% | 1,588 | 49.8% |
| 6. | United States | 73,578 | 18,140 | 51.3% | 17,211 | 48.7% |
| 7. | Taiwan | 2,822 | 1,105 | 54.7% | 916 | 45.3% |
| 8. | New Zealand | 458 | 189 | 54.9% | 155 | 45.1% |
| 9. | Japan | 7,349 | 3,223 | 55.5% | 2,581 | 44.5% |
| 10. |  Spain | 2,167 | 626 | 55.5% | 501 | 44.5% |
| 11. | Pakistan | 319 | 79 | 56.0% | 62 | 44.0% |
| 12. | Hong Kong | 1,008 | 297 | 56.0% | 233 | 44.0% |
| 13. | Belgium | 1,599 | 590 | 56.1% | 461 | 43.9% |
| 14. |  France | 5,842 | 2,125 | 56.3% | 1,649 | 43.7% |
| 15. | Canada | 3,230 | 1,486 | 57.0% | 1,119 | 43.0% |
| 16. | Bahrain | 15 | 4 | 57.1% | 3 | 42.9% |
| 17. | Portugal | 861 | 359 | 59.6% | 243 | 40.4% |
| 18. | Liechtenstein | 12 | 6 | 60.0% | 4 | 40.0% |
| 19. | Moldova | 177 | 70 | 60.3% | 46 | 39.7% |
| 20. | China | 3,599 | 1,670 | 60.7% | 1,082 | 39.3% |
| 21. |  Ukraine | 2,056 | 779 | 60.9% | 501 | 39.1% |
| 22. |  Cambodia | 17 | 5 | 62.5% | 3 | 37.5% |
| 23. |  Malaysia | 1,005 | 421 | 62.6% | 252 | 37.4% |
| 24. | United Kingdom | 4,483 | 1,796 | 62.6% | 1,072 | 37.4% |
| 25. |  South Korea | 1,351 | 99 | 62.7% | 59 | 37.3% |
Default browser protocol
The graph below 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 red bars will grow taller than the blue ones.
Top 25 countries for IPv6 default (Apr 2013)
| Country | Test count | IPv4 | IPv4 % | IPv6 | IPv6 % | |
|---|---|---|---|---|---|---|
| 1. | Liechtenstein | 12 | 2 | 16.7% | 10 | 83.3% |
| 2. | Slovenia | 516 | 174 | 33.7% | 342 | 66.3% |
| 3. | United States | 73,578 | 27,801 | 37.8% | 45,777 | 62.2% |
| 4. | Macedonia | 139 | 66 | 47.5% | 73 | 52.5% |
| 5. | Pakistan | 319 | 159 | 49.8% | 160 | 50.2% |
| 6. | Japan | 7,349 | 4,187 | 57.0% | 3,162 | 43.0% |
| 7. | Portugal | 861 | 508 | 59.0% | 353 | 41.0% |
| 8. | Bahrain | 15 | 9 | 60.0% | 6 | 40.0% |
| 9. | Netherlands | 5,826 | 3,674 | 63.1% | 2,152 | 36.9% |
| 10. | Taiwan | 2,822 | 1,810 | 64.1% | 1,012 | 35.9% |
| 11. | Nepal | 17 | 11 | 64.7% | 6 | 35.3% |
| 12. | Viet Nam | 447 | 290 | 64.9% | 157 | 35.1% |
| 13. | China | 3,599 | 2,377 | 66.0% | 1,222 | 34.0% |
| 14. | Canada | 3,230 | 2,136 | 66.1% | 1,094 | 33.9% |
| 15. | Belgium | 1,599 | 1,059 | 66.2% | 540 | 33.8% |
| 16. | Greece | 647 | 429 | 66.3% | 218 | 33.7% |
| 17. | United Kingdom | 4,483 | 2,979 | 66.5% | 1,504 | 33.5% |
| 18. |  Iceland | 45 | 30 | 66.7% | 15 | 33.3% |
| 19. |  Montenegro | 12 | 8 | 66.7% | 4 | 33.3% |
| 20. | France | 5,842 | 3,895 | 66.7% | 1,947 | 33.3% |
| 21. | Germany | 12,228 | 8,277 | 67.7% | 3,951 | 32.3% |
| 22. | Switzerland | 2,363 | 1,603 | 67.8% | 760 | 32.2% |
| 23. |  Panama | 25 | 17 | 68.0% | 8 | 32.0% |
| 24. | New Zealand | 458 | 313 | 68.3% | 145 | 31.7% |
| 25. |  Mexico | 398 | 272 | 68.3% | 126 | 31.7% |
Default browser protocol (dual-stack users)
The graph below 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 countries for IPv6 default (dual-stack users, Apr 2013)
| Country | Test count | IPv4 | IPv4 % | IPv6 | IPv6 % | |
|---|---|---|---|---|---|---|
| 1. |  Peru | 1 | 0 | 0.0% | 1 | 100.0% |
| 2. |  Iran | 4 | 0 | 0.0% | 4 | 100.0% |
| 3. |  Ecuador | 5 | 0 | 0.0% | 5 | 100.0% |
| 4. |  Faroe Islands | 1 | 0 | 0.0% | 1 | 100.0% |
| 5. |  Qatar | 14 | 1 | 7.1% | 13 | 92.9% |
| 6. | Liechtenstein | 11 | 1 | 9.1% | 10 | 90.9% |
| 7. |  Colombia | 19 | 2 | 10.5% | 17 | 89.5% |
| 8. | Iceland | 17 | 2 | 11.8% | 15 | 88.2% |
| 9. | Slovenia | 381 | 47 | 12.3% | 334 | 87.7% |
| 10. | Macedonia | 83 | 11 | 13.3% | 72 | 86.7% |
| 11. |  Cyprus | 7 | 1 | 14.3% | 6 | 85.7% |
| 12. | Bahrain | 7 | 1 | 14.3% | 6 | 85.7% |
| 13. | United States | 36,929 | 5,370 | 14.5% | 31,559 | 85.5% |
| 14. | Pakistan | 190 | 36 | 18.9% | 154 | 81.1% |
| 15. | Montenegro | 5 | 1 | 20.0% | 4 | 80.0% |
| 16. |  Philippines | 98 | 21 | 21.4% | 77 | 78.6% |
| 17. |  Romania | 1,036 | 224 | 21.6% | 812 | 78.4% |
| 18. | Portugal | 369 | 80 | 21.7% | 289 | 78.3% |
| 19. | Japan | 3,982 | 924 | 23.2% | 3,058 | 76.8% |
| 20. |  El Salvador | 8 | 2 | 25.0% | 6 | 75.0% |
| 21. |  Bosnia And Herzegovina | 4 | 1 | 25.0% | 3 | 75.0% |
| 22. | Panama | 11 | 3 | 27.3% | 8 | 72.7% |
| 23. | United Kingdom | 2,030 | 591 | 29.1% | 1,439 | 70.9% |
| 24. | Belgium | 736 | 217 | 29.5% | 519 | 70.5% |
| 25. | Greece | 300 | 89 | 29.7% | 211 | 70.3% |
IPv6 address types
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.
Top 25 countries for native IPv6 support (Apr 2013)
| Country | Test count | Native | Native % | 6to4 | 6to4 % | Teredo | Teredo % | |
|---|---|---|---|---|---|---|---|---|
| 1. |  Oman | 2 | 2 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 2. | Colombia | 19 | 19 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 3. | Cyprus | 7 | 7 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 4. | Faroe Islands | 1 | 1 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 5. | Iran | 4 | 4 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 6. |  Lithuania | 17 | 17 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 7. | Liechtenstein | 11 | 11 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 8. | Bahrain | 7 | 7 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 9. | Peru | 1 | 1 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 10. |  Armenia | 5 | 5 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 11. | Bosnia And Herzegovina | 4 | 4 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 12. | Iceland | 17 | 17 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 13. |  Costa Rica | 3 | 3 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 14. | Qatar | 16 | 16 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 15. |  Grenada | 3 | 3 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 16. | Ecuador | 9 | 9 | 100.0% | 0 | 0.0% | 0 | 0.0% |
| 17. | Pakistan | 196 | 194 | 99.0% | 1 | 0.5% | 1 | 0.5% |
| 18. | Portugal | 427 | 420 | 98.4% | 1 | 0.2% | 6 | 1.4% |
| 19. | Viet Nam | 219 | 215 | 98.2% | 0 | 0.0% | 4 | 1.8% |
| 20. |  Luxembourg | 47 | 46 | 97.9% | 0 | 0.0% | 1 | 2.1% |
| 21. | Mexico | 178 | 173 | 97.2% | 2 | 1.1% | 3 | 1.7% |
| 22. | Japan | 4,079 | 3,955 | 97.0% | 71 | 1.7% | 53 | 1.3% |
| 23. | United States | 51,494 | 49,775 | 96.7% | 1,496 | 2.9% | 223 | 0.4% |
| 24. |  Singapore | 472 | 454 | 96.2% | 13 | 2.8% | 5 | 1.1% |
| 25. | Greece | 306 | 293 | 95.8% | 7 | 2.3% | 6 | 2.0% |
Downstream bandwidth
This one 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 countries for IPv6 speed (Apr 2013)
| Country | IPv4 average | IPv6 average | IPv6 / IPv4 ratio | |
|---|---|---|---|---|
| 1. | Bosnia And Herzegovina | 1.9 Mbps | 12.0 Mbps | 628.1% |
| 2. |  Lebanon | 0.5 Mbps | 1.3 Mbps | 244.9% |
| 3. |  Brazil | 6.8 Mbps | 10.1 Mbps | 147.1% |
| 4. |  Austria | 17.4 Mbps | 23.1 Mbps | 132.5% |
| 5. | Japan | 6.1 Mbps | 7.7 Mbps | 126.9% |
| 6. | China | 1.7 Mbps | 2.1 Mbps | 122.9% |
| 7. |  Tunisia | 1.5 Mbps | 1.7 Mbps | 114.0% |
| 8. |  India | 6.0 Mbps | 6.7 Mbps | 110.4% |
| 9. | Malaysia | 5.4 Mbps | 6.0 Mbps | 110.3% |
| 10. | Greece | 11.3 Mbps | 12.3 Mbps | 108.8% |
| 11. |  Denmark | 19.0 Mbps | 20.2 Mbps | 106.3% |
| 12. | Montenegro | 0.5 Mbps | 0.5 Mbps | 103.4% |
| 13. |  Hungary | 17.0 Mbps | 17.2 Mbps | 101.4% |
| 14. | Luxembourg | 9.5 Mbps | 9.5 Mbps | 99.8% |
| 15. | Liechtenstein | 26.5 Mbps | 26.2 Mbps | 98.9% |
| 16. |  United Arab Emirates | 0.5 Mbps | 0.5 Mbps | 95.6% |
| 17. |  Uganda | 0.4 Mbps | 0.4 Mbps | 95.5% |
| 18. |  Nigeria | 3.0 Mbps | 2.8 Mbps | 95.1% |
| 19. | Philippines | 1.2 Mbps | 1.1 Mbps | 93.8% |
| 20. | Netherlands | 19.8 Mbps | 18.5 Mbps | 93.6% |
| 21. | Norway | 26.6 Mbps | 24.2 Mbps | 91.2% |
| 22. | Switzerland | 18.7 Mbps | 16.7 Mbps | 89.7% |
| 23. | France | 10.0 Mbps | 8.9 Mbps | 89.3% |
| 24. | South Korea | 4.5 Mbps | 4.1 Mbps | 89.3% |
| 25. |  Israel | 14.9 Mbps | 13.3 Mbps | 88.7% |
Country level statistics
Afghanistan, Aland Islands, Albania, Algeria, American Samoa, Andorra, Angola, Anguilla, Antarctica, Antigua And Barbuda, Argentina, Armenia, Aruba, Australia, Austria, Azerbaijan, Bahamas, Bahrain, Bangladesh, Barbados, Belarus, Belgium, Belize, Benin, Bermuda, Bhutan, Bolivia, Bosnia And Herzegovina, Botswana, Bouvet Island, Brazil, British Indian Ocean Territory, British Virgin Islands, Brunei Darussalam, Bulgaria, Burkina Faso, Burundi, Cambodia, Cameroon, Canada, Cape Verde, Cayman Islands, Central African Republic, Chad, Chile, China, Christmas Island, Cocos (keeling) Islands, Colombia, Comoros, Congo, Cook Islands, Costa Rica, Cote D'ivoire, Croatia, Cuba, Cyprus, Czech Republic, Democratic Republic Of Congo, Denmark, Djibouti, Dominica, Dominican Republic, Ecuador, Egypt, El Salvador, Equatorial Guinea, Eritrea, Estonia, Ethiopia, European Union, Falkland Islands (malvinas), Faroe Islands, Fiji, Finland, France, French Guiana, French Polynesia, French Southern Territories, Gabon, Gambia, Georgia, Germany, Ghana, Gibraltar, Greece, Greenland, Grenada, Guadeloupe, Guam, Guatemala, Guernsey, Guinea, Guinea-bissau, Guyana, Haiti, Heard Island And Mcdonald Islands, Honduras, Hong Kong, Hungary, Iceland, India, Indonesia, Iran, Iraq, Ireland, Isle Of Man, Israel, Italy, Jamaica, Japan, Jersey, Jordan, Kazakhstan, Kenya, Kiribati, Kuwait, Kyrgyzstan, Lao, Latvia, Lebanon, Lesotho, Liberia, Libyan Arab Jamahiriya, Liechtenstein, Lithuania, Luxembourg, Macao, Macedonia, Madagascar, Malawi, Malaysia, Maldives, Mali, Malta, Marshall Islands, Martinique, Mauritania, Mauritius, Mayotte, Mexico, Micronesia, Moldova, Monaco, Mongolia, Montenegro, Montserrat, Morocco, Mozambique, Myanmar, Namibia, Nauru, Nepal, Netherlands, Netherlands Antilles, New Caledonia, New Zealand, Nicaragua, Niger, Nigeria, Niue, Norfolk Island, North Korea, Northern Mariana Islands, Norway, Oman, Pakistan, Palau, Palestinian Territory, Panama, Papua New Guinea, Paraguay, Peru, Philippines, Pitcairn, Poland, Portugal, Puerto Rico, Qatar, Reunion Island, Romania, Russian Federation, Rwanda, Saint Barthelemy, Saint Helena, Saint Kitts And Nevis, Saint Lucia, Saint Martin, Saint Pierre And Miquelon, Saint Vincent And The Grenadines, Samoa, San Marino, Sao Tome And Principe, Saudi Arabia, Senegal, Serbia, Serbia, Seychelles, Sierra Leone, Singapore, Slovakia, Slovenia, Solomon Islands, Somalia, South Africa, South Georgia And The South Sandwich Islands, South Korea, Spain, Sri Lanka, Sudan, Suriname, Svalbard And Jan Mayen, Swaziland, Sweden, Switzerland, Syrian Arab Republic, Taiwan, Tajikistan, Tanzania, Thailand, Timor-leste, Togo, Tokelau, Tonga, Trinidad And Tobago, Tunisia, Turkey, Turkmenistan, Turks And Caicos Islands, Tuvalu, U.s. Virgin Islands, Uganda, Ukraine, United Arab Emirates, United Kingdom, United States, United States Minor Outlying Islands, Uruguay, Uzbekistan, Vanuatu, Vatican, Venezuela, Viet Nam, Wallis And Futuna, Western Sahara, Yemen, Zambia, Zimbabwe