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 (Nov 2016)

  ISP IPv6 tests count
1.Cngi-cernet23,155
2.Hurricane Electric1,539
3.Zparknet995
4.Cernet975
5.CT Networks622
6.Cernet2-tsinghua6596
7.Zsu6-cernet461
8.Buaa6-cernet2392
9.Szu6-cernet350
10.Hust6-cernet341
11.Xidian6-cernet322
12.Cernet2-tju6289
13.Chinanet-gd287
14.Pku6-cernet2250
15.Cstnet-cnnic235
16.China Unicom Beijing Province Network202
17.Tongji6-cernet2143
18.Buct6-cernet140
19.Chinanet-sc130
20.Zju6-cernet2125
21.Dlut6-cernet2122
22.Sjtu6-cernet2101
23.Cumtb6-cernet101
24.Neu6-cernet2100
25.Sdu6-cernet297

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, Nov 2016)

  ISP Unique IPv6 addresses
1.Cngi-cernet22,029
2.Hurricane Electric942
3.Cernet514
4.Cernet2-tsinghua6410
5.CT Networks386
6.Zsu6-cernet252
7.Zparknet246
8.Buaa6-cernet2241
9.Cernet2-tju6212
10.Hust6-cernet203
11.Xidian6-cernet188
12.Pku6-cernet2179
13.Cstnet-cnnic173
14.Chinanet-gd173
15.China Unicom Beijing Province Network120
16.Szu6-cernet116
17.Zju6-cernet290
18.Dlut6-cernet289
19.Cumtb6-cernet76
20.Sdu6-cernet274
21.Neu6-cernet273
22.China Mobile communications corporation63
23.Nankai6-cernet60
24.Chinanet-sc58
25.Chinanet-js56

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 (Nov 2016)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Hrbeu6-cernet2100.0%21100.0%
2.Ningbo-shengdong-ltd700.0%7100.0%
3.Stu6-cernet3013.3%2996.7%
4.Cumtb6-cernet10144.0%9796.0%
5.Scu6-cernet1616.3%1593.8%
6.Bjmu6-cernet1119.1%1090.9%
7.Cernet2-hernet62229.1%2090.9%
8.Cau6-cernet20210.0%1890.0%
9.Jlu6-cernet229310.3%2689.7%
10.Swufe6-cernet20315.0%1785.0%
11.Xjtu6-cernet721115.3%6184.7%
12.Uestc6-cernet213215.4%1184.6%
13.Ahu6-cernet39615.4%3384.6%
14.Buct6-cernet1402215.7%11884.3%
15.Szu6-cernet3505515.7%29584.3%
16.Szuc6-cernet48816.7%4083.3%
17.Pku6-cernet22504216.8%20883.2%
18.Cernet2-tsinghua659610417.4%49282.6%
19.Whu6-cernet721318.1%5981.9%
20.Nankai6-cernet911718.7%7481.3%
21.China Unicom961818.8%7881.3%
22.Fudan6-cernet2631219.0%5181.0%
23.Cstnet-cnnic2354619.6%18980.4%
24.Buaa6-cernet23927819.9%31480.1%
25.Cer2bkb6-cernet25120.0%480.0%

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 (Nov 2016)

  ISP Test count IPv6 average
1.Cernet2-ruc64355.8 Mbps
2.Buct6-cernet14033.0 Mbps
3.Cumtb6-cernet10127.1 Mbps
4.Cstnet-cnnic23521.0 Mbps
5.CNC Group CHINA169 Tianjin Province Network2016.1 Mbps
6.Sjtu6-cernet210115.9 Mbps
7.Tongji6-cernet214315.6 Mbps
8.Pku6-cernet225014.8 Mbps
9.China Unicom CHINA169 Jiangsu Province Network1014.7 Mbps
10.Neu6-cernet210014.5 Mbps
11.Nankai6-cernet9114.0 Mbps
12.Cau6-cernet2013.0 Mbps
13.Cernet2-tju628912.4 Mbps
14.Zsu6-cernet46112.3 Mbps
15.Uestc6-cernet21311.9 Mbps
16.Cqu6-cernet24411.6 Mbps
17.Buaa6-cernet239211.2 Mbps
18.Hrbeu6-cernet2110.9 Mbps
19.Scu6-cernet1610.7 Mbps
20.Cngi-cernet23,15510.6 Mbps
21.Cernet97510.5 Mbps
22.Tju6-cernet24610.0 Mbps
23.Dlut6-cernet21229.9 Mbps
24.Jlu6-cernet2299.3 Mbps
25.Hust6-cernet3419.1 Mbps