China IPv6 in China

These graphs show the evolution of default protocol, v6 address types, and average bandwidth in China 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 China

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 China (Feb 2018)

  ISP IPv6 tests count
1.Cngi-cernet23,051
2.Hurricane Electric1,738
3.Zparknet1,435
4.Cernet685
5.Pku6-cernet2681
6.CT Networks675
7.Cernet2-tsinghua6415
8.China Mobile communications corporation316
9.Chinanet-gd301
10.Hust6-cernet285
11.Cstnet-cnnic282
12.Buaa6-cernet2272
13.Cernet2-tju6261
14.Zsu6-cernet232
15.Cstnet203
16.China Unicom Beijing Province Network184
17.China Unicom175
18.Xidian6-cernet154
19.Whu6-cernet151
20.Xjtu6-cernet105
21.CNC Group CHINA169 Tianjin Province Network100
22.Chinanet-sh97
23.Dlut6-cernet291
24.Chinanet-js91
25.Nwpu6-cernet87

IPv6 and v4 protocol support in China (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 China (unique addresses, Feb 2018)

  ISP Unique IPv6 addresses
1.Cngi-cernet22,009
2.Hurricane Electric1,018
3.Zparknet537
4.Pku6-cernet2523
5.Cernet437
6.CT Networks425
7.Cernet2-tsinghua6280
8.China Mobile communications corporation221
9.Chinanet-gd210
10.Cstnet-cnnic200
11.Buaa6-cernet2194
12.Cernet2-tju6170
13.Hust6-cernet165
14.Cstnet135
15.China Unicom Beijing Province Network134
16.Zsu6-cernet130
17.China Unicom110
18.Xidian6-cernet82
19.Chinanet-js71
20.Dlut6-cernet270
21.Whu6-cernet69
22.Chinanet-sh66
23.Nwpu6-cernet64
24.Nankai6-cernet60
25.Xjtu6-cernet54

Default browser protocol in China

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 China (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 China (Feb 2018)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Hao Long900.0%9100.0%
2.Nato Research Ltd.900.0%9100.0%
3.Xtom1100.0%11100.0%
4.Zzu6-cernet600.0%6100.0%
5.Jamesits500.0%5100.0%
6.Jlu6-cernet23525.7%3394.3%
7.Jmu6-cernet4836.3%4593.8%
8.Fudan6-cernet24037.5%3792.5%
9.NetAssist6469.4%5890.6%
10.Hrbeu6-cernet6169.8%5590.2%
11.Cstnet2032512.3%17887.7%
12.Uestc6-cernet216212.5%1487.5%
13.Cernet2-ruc655712.7%4887.3%
14.Cer2bkb6-cernet239512.8%3487.2%
15.Xmu6-cernet252713.5%4586.5%
16.Cstnet-cnnic2824114.5%24185.5%
17.Pku6-cernet268110515.4%57684.6%
18.Ustc6-cernet238615.8%3284.2%
19.Szuc6-cernet55916.4%4683.6%
20.Buaa6-cernet22724516.5%22783.5%
21.China Unicom1752916.6%14683.4%
22.Stu6-cernet42716.7%3583.3%
23.Neu6-cernet2761317.1%6382.9%
24.Lzu6-cernet2701217.1%5882.9%
25.Zspnet17317.6%1482.4%

IPv6 address types in China

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 China

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 China (Feb 2018)

  ISP Test count IPv6 average
1.Bjmu6-cernet25151.7 Mbps
2.Tsinghua6-cernet25970.1 Mbps
3.CERNET New Technology Co.7050.5 Mbps
4.NetAssist6449.7 Mbps
5.Cumtb6-cernet1947.3 Mbps
6.Jlu6-cernet23538.7 Mbps
7.Sdu6-cernet23033.5 Mbps
8.Buaa6-cernet227231.6 Mbps
9.China Unicom Tianjin Province Network8629.7 Mbps
10.China Unicom17525.7 Mbps
11.Hust6-cernet28520.8 Mbps
12.Pku6-cernet268120.4 Mbps
13.CNC Group CHINA169 Henan Province Network5419.1 Mbps
14.Cernet2-tsinghua641518.7 Mbps
15.Cstnet20316.6 Mbps
16.Chinanet-sc7116.6 Mbps
17.CNC Group CHINA169 Tianjin Province Network10014.9 Mbps
18.Hurricane Electric1,73814.8 Mbps
19.Zsu6-cernet23214.7 Mbps
20.Jmu6-cernet4813.4 Mbps
21.Dlut6-cernet29113.2 Mbps
22.CHINANET jiangsu province network3013.1 Mbps
23.China Unicom Liaoning Province Network3312.9 Mbps
24.China Unicom Shandong Province Network5812.7 Mbps
25.China Unicom CHINA169 Network2812.4 Mbps