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 (Jul 2020)

  ISP IPv6 tests count
1.China Unicom Network3,437
2.Chinanet2,981
3.China Mobile892
4.China Mobile communications corporation344
5.China Next Generation Internet CERNET2237
6.Cstnet114
7.Cngi-cernet296
8.Cernet49
9.Cernet2-tsinghua639
10.CERNET2 IX at Tianjin University33
11.Hurricane Electric LLC21
12.DMIT Inc19
13.Baidu16
14.Qihoo15
15.CTM Internet Service13
16.China Unicom Beijing Province Network11
17.China Unicom CHINA169 Network8
18.CHINANET Guangdong province Shenzhen MAN network7
19.Kuaishou-kj6
20.CNC Group CHINA169 Liaoning Province Network6

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, Jul 2020)

  ISP Unique IPv6 addresses
1.China Unicom Network2,766
2.Chinanet2,079
3.China Mobile635
4.China Mobile communications corporation253
5.China Next Generation Internet CERNET2170
6.Cstnet91
7.Cngi-cernet279
8.Cernet28
9.CERNET2 IX at Tianjin University28
10.Cernet2-tsinghua618
11.Baidu14
12.Hurricane Electric LLC14
13.CTM Internet Service11
14.China Unicom Beijing Province Network8
15.Qihoo7
16.Kuaishou-kj5
17.DMIT Inc4
18.CNC Group CHINA169 Liaoning Province Network3
19.China Unicom CHINA169 Network3
20.CHINANET Guangdong province Shenzhen MAN network2

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 (Jul 2020)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.CTM Internet Service1300.0%13100.0%
2.Hurricane Electric LLC2114.8%2095.2%
3.Qihoo1516.7%1493.3%
4.Cstnet1141513.2%9986.8%
5.Cernet2-tsinghua639615.4%3384.6%
6.Cernet491020.4%3979.6%
7.CERNET2 IX at Tianjin University33824.2%2575.8%
8.China Mobile89222725.4%66574.6%
9.Cngi-cernet2962627.1%7072.9%
10.China Unicom Network3,4371,07831.4%2,35968.6%
11.China Mobile communications corporation34411132.3%23367.7%
12.China Next Generation Internet CERNET22377732.5%16067.5%
13.Chinanet2,9811,44748.5%1,53451.5%
14.Kuaishou-kj6350.0%350.0%
15.China Unicom CHINA169 Network8450.0%450.0%
16.Baidu161062.5%637.5%
17.China Unicom Beijing Province Network11872.7%327.3%
18.CHINANET Guangdong province Shenzhen MAN network7685.7%114.3%
19.DMIT Inc191789.5%210.5%
20.CNC Group CHINA169 Liaoning Province Network66100.0%00.0%

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 (Jul 2020)

  ISP Test count IPv6 average
1.Cernet4931.2 Mbps
2.Cstnet11421.5 Mbps
3.China Next Generation Internet CERNET223711.9 Mbps
4.China Mobile89211.8 Mbps
5.Cngi-cernet2969.7 Mbps
6.China Mobile communications corporation3443.0 Mbps
7.China Unicom Network3,4370.9 Mbps
8.Cernet2-tsinghua6390.5 Mbps
9.CERNET2 IX at Tianjin University330.3 Mbps
10.China Unicom CHINA169 Network80.1 Mbps
11.Chinanet2,9810.1 Mbps
12.Hurricane Electric LLC210.0 Mbps
13.Kuaishou-kj60.0 Mbps
14.DMIT Inc190.0 Mbps
15.Baidu160.0 Mbps
16.CHINANET Guangdong province Shenzhen MAN network70.0 Mbps
17.Qihoo150.0 Mbps
18.CNC Group CHINA169 Liaoning Province Network60.0 Mbps
19.China Unicom Beijing Province Network110.0 Mbps
20.CTM Internet Service130.0 Mbps