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 (Jun 2018)

  ISP IPv6 tests count
1.Cngi-cernet24,296
2.CT Networks2,846
3.Zsu6-cernet1,840
4.Lzu6-cernet21,263
5.Hurricane Electric LLC1,222
6.Zparknet1,198
7.Cernet1,187
8.Cernet2-tsinghua6815
9.Buaa6-cernet2661
10.Pku6-cernet2534
11.China Unicom Network463
12.Hurricane Electric445
13.Zzu6-cernet2399
14.Cernet2-tju6384
15.Cstnet-cnnic341
16.Cstnet332
17.Chinanet-js325
18.Hust6-cernet320
19.Dlut6-cernet2249
20.Chinanet-gd232
21.Nankai6-cernet230
22.China Mobile188
23.Xidian6-cernet187
24.Nwpu6-cernet180
25.China Mobile communications corporation173

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, Jun 2018)

  ISP Unique IPv6 addresses
1.Cngi-cernet22,965
2.CT Networks1,775
3.Zsu6-cernet1,228
4.Lzu6-cernet2847
5.Cernet777
6.Hurricane Electric LLC699
7.Cernet2-tsinghua6509
8.Zparknet439
9.Buaa6-cernet2374
10.Pku6-cernet2358
11.Hurricane Electric300
12.Zzu6-cernet2298
13.China Unicom Network290
14.Cernet2-tju6281
15.Cstnet-cnnic272
16.Cstnet228
17.Chinanet-js180
18.Dlut6-cernet2179
19.Chinanet-gd165
20.Nankai6-cernet164
21.Hust6-cernet157
22.China Mobile communications corporation128
23.China Mobile122
24.Nwpu6-cernet122
25.Szu6-cernet122

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 (Jun 2018)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Cncitynet500.0%5100.0%
2.Shhj700.0%7100.0%
3.Chd6-cernet800.0%8100.0%
4.Qihoo600.0%6100.0%
5.Hrbeu6-cernet1100.0%11100.0%
6.Bupt6-cernet21100.0%11100.0%
7.China Next Generation Internet CERNET26734.5%6495.5%
8.Xmu6-cernet210066.0%9494.0%
9.Bjmu6-cernet2827.1%2692.9%
10.Jmu6-cernet1417.1%1392.9%
11.Tyut6-cernet1317.7%1292.3%
12.Xjtu6-cernet90910.0%8190.0%
13.Uestc6-cernet263711.1%5688.9%
14.CERNET New Technology Co.52611.5%4688.5%
15.Tencent17211.8%1588.2%
16.Wasuhz8112.5%787.5%
17.Nankai6-cernet2303013.0%20087.0%
18.Nwu6-cernet30413.3%2686.7%
19.Ahu6-cernet36513.9%3186.1%
20.Ihep7114.3%685.7%
21.CTM Internet Service54814.8%4685.2%
22.Cumtb6-cernet59915.3%5084.7%
23.Cau6-cernet851416.5%7183.5%
24.Nstuaf6-cernet30516.7%2583.3%
25.Cstnet3325717.2%27582.8%

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 (Jun 2018)

  ISP Test count IPv6 average
1.Hurricane Electric44545.5 Mbps
2.China Unicom Network46335.2 Mbps
3.China Mobile18835.0 Mbps
4.China Unicom8631.2 Mbps
5.Beijing Fengniao Network Technology Co1617.9 Mbps
6.CTM Internet Service5417.7 Mbps
7.China Unicom CHINA169 Jiangsu Province Network1216.5 Mbps
8.CNC Group CHINA169 Chongqing Province Network715.5 Mbps
9.Digicore Limited2714.4 Mbps
10.CT Networks2,84614.0 Mbps
11.Nato Research Ltd.513.6 Mbps
12.Hurricane Electric LLC1,22213.6 Mbps
13.Chinanet-sc469.1 Mbps
14.Choopa298.2 Mbps
15.Pbsl94.8 Mbps
16.Ihep74.0 Mbps
17.Chinanet-fj413.2 Mbps
18.Uestc6-cernet2632.9 Mbps
19.Chinanet-ha142.9 Mbps
20.Chinanet-gx132.7 Mbps
21.Chinanet-hb282.7 Mbps
22.CNC Group CHINA169 Tianjin Province Network232.5 Mbps
23.CHINANET jiangsu province network342.4 Mbps
24.China Unicom Guangxi Province Network121.8 Mbps
25.Chinanet-gd2321.7 Mbps