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 (Oct 2020)

  ISP IPv6 tests count
1.Chinanet3,145
2.China Unicom Network1,958
3.China Mobile1,167
4.China Mobile communications corporation1,086
5.Cstnet862
6.China Next Generation Internet CERNET2585
7.Cngi-cernet2395
8.Cernet83
9.CERNET2 IX at Tianjin University65
10.Cernet2-tsinghua653
11.Hurricane Electric LLC52
12.CTM Internet Service30
13.DMIT Inc19
14.China Education and Research Network16
15.BeiJing-Telecom-UserAddress-lowguaranteed16
16.10VPN Hosting7
17.Gtjanet6
18.Ihep5
19.RIPE Network Coordination Center5
20.CERNET2 IX at Shanghai Jiaotong University5
21.China Unicom Beijing Province Network5
22.Philippine Long Distance Telephone Co.5
23.Dqtnet5

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, Oct 2020)

  ISP Unique IPv6 addresses
1.Chinanet2,074
2.China Unicom Network1,444
3.China Mobile805
4.China Mobile communications corporation726
5.Cstnet635
6.China Next Generation Internet CERNET2405
7.Cngi-cernet2294
8.Cernet68
9.Cernet2-tsinghua639
10.CERNET2 IX at Tianjin University37
11.Hurricane Electric LLC30
12.CTM Internet Service23
13.China Education and Research Network10
14.BeiJing-Telecom-UserAddress-lowguaranteed10
15.DMIT Inc8
16.Gtjanet6
17.Ihep4
18.CERNET2 IX at Shanghai Jiaotong University4
19.RIPE Network Coordination Center3
20.China Unicom Beijing Province Network3
21.10VPN Hosting2
22.Philippine Long Distance Telephone Co.2
23.Dqtnet2

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 (Oct 2020)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.CTM Internet Service3000.0%30100.0%
2.Philippine Long Distance Telephone Co.500.0%5100.0%
3.Gtjanet600.0%6100.0%
4.CERNET2 IX at Shanghai Jiaotong University500.0%5100.0%
5.RIPE Network Coordination Center500.0%5100.0%
6.Ihep500.0%5100.0%
7.Cstnet8629911.5%76388.5%
8.Hurricane Electric LLC52917.3%4382.7%
9.Dqtnet5120.0%480.0%
10.Cernet831922.9%6477.1%
11.China Next Generation Internet CERNET258514424.6%44175.4%
12.China Mobile1,16729825.5%86974.5%
13.China Mobile communications corporation1,08628025.8%80674.2%
14.Cngi-cernet239510727.1%28872.9%
15.Cernet2-tsinghua6531528.3%3871.7%
16.China Unicom Network1,95865233.3%1,30666.7%
17.CERNET2 IX at Tianjin University652436.9%4163.1%
18.China Education and Research Network16743.8%956.3%
19.Chinanet3,1451,64552.3%1,50047.7%
20.10VPN Hosting7457.1%342.9%
21.DMIT Inc191684.2%315.8%
22.BeiJing-Telecom-UserAddress-lowguaranteed161487.5%212.5%
23.China Unicom Beijing Province Network55100.0%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 (Oct 2020)

  ISP Test count IPv6 average
1.Hurricane Electric LLC5276.8 Mbps
2.Cstnet86218.6 Mbps
3.DMIT Inc1916.9 Mbps
4.China Mobile1,1679.6 Mbps
5.Cngi-cernet23959.4 Mbps
6.Cernet2-tsinghua6539.3 Mbps
7.China Mobile communications corporation1,0869.2 Mbps
8.Cernet837.7 Mbps
9.China Next Generation Internet CERNET25855.0 Mbps
10.China Unicom Network1,9581.6 Mbps
11.China Education and Research Network160.3 Mbps
12.Chinanet3,1450.2 Mbps
13.CERNET2 IX at Tianjin University650.2 Mbps
14.Dqtnet50.1 Mbps
15.CTM Internet Service300.0 Mbps
16.RIPE Network Coordination Center50.0 Mbps
17.CERNET2 IX at Shanghai Jiaotong University50.0 Mbps
18.BeiJing-Telecom-UserAddress-lowguaranteed160.0 Mbps
19.China Unicom Beijing Province Network50.0 Mbps
20.Gtjanet60.0 Mbps
21.10VPN Hosting70.0 Mbps
22.Philippine Long Distance Telephone Co.50.0 Mbps
23.Ihep50.0 Mbps