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 (Aug 2019)

  ISP IPv6 tests count
1.Chinanet4,225
2.China Unicom Network1,918
3.China Mobile communications corporation1,478
4.China Mobile1,244
5.China Next Generation Internet CERNET2798
6.Zparknet485
7.Cngi-cernet2457
8.Cernet270
9.Cernet2-tsinghua6230
10.Hurricane Electric LLC160
11.CERNET2 IX at Tianjin University97
12.Cstnet-cnnic95
13.Cstnet65
14.DMIT Inc47
15.Fish-Network35
16.Asia Pacific Network Information Centre, Regional Internet Registry for the Asia-Pacific Region, 6 Cordelia Street, PO Box 3646, South Brisbane, QLD 4101, Australia22
17.Heyixinxi13
18.BEIJING ZHONGGUANCUN SOFTWARE PARK DEVELOPMENT CO., Ltd.11
19.CNC Group CHINA169 Hebei Province Network10
20.BeiJing-Telecom-UserAddress-lowguaranteed9
21.CERNET2 IX at Shanghai Jiaotong University8
22.Baidu6
23.China Unicom Anhui Province Network6
24.Alisoft5
25.China-21vianet5

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, Aug 2019)

  ISP Unique IPv6 addresses
1.Chinanet2,826
2.China Unicom Network1,348
3.China Mobile communications corporation1,023
4.China Mobile866
5.China Next Generation Internet CERNET2546
6.Cngi-cernet2326
7.Zparknet230
8.Cernet171
9.Cernet2-tsinghua6140
10.Hurricane Electric LLC102
11.Cstnet-cnnic70
12.Cstnet43
13.CERNET2 IX at Tianjin University42
14.DMIT Inc17
15.Fish-Network17
16.Heyixinxi11
17.CERNET2 IX at Shanghai Jiaotong University7
18.Asia Pacific Network Information Centre, Regional Internet Registry for the Asia-Pacific Region, 6 Cordelia Street, PO Box 3646, South Brisbane, QLD 4101, Australia7
19.Baidu6
20.BeiJing-Telecom-UserAddress-lowguaranteed5
21.China Unicom Anhui Province Network5
22.10VPN Hosting5
23.BEIJING ZHONGGUANCUN SOFTWARE PARK DEVELOPMENT CO., Ltd.4
24.China-21vianet3
25.CNC Group CHINA169 Hebei Province Network3

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 (Aug 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.10VPN Hosting500.0%5100.0%
2.BEIJING ZHONGGUANCUN SOFTWARE PARK DEVELOPMENT CO., Ltd.1100.0%11100.0%
3.China-21vianet500.0%5100.0%
4.Cstnet6557.7%6092.3%
5.Fish-Network35411.4%3188.6%
6.CERNET2 IX at Shanghai Jiaotong University8112.5%787.5%
7.Hurricane Electric LLC1602314.4%13785.6%
8.Cernet2704115.2%22984.8%
9.Baidu6116.7%583.3%
10.Cernet2-tsinghua62303917.0%19183.0%
11.Cngi-cernet24578518.6%37281.4%
12.Cstnet-cnnic951818.9%7781.1%
13.China Next Generation Internet CERNET279815519.4%64380.6%
14.China Mobile1,24426421.2%98078.8%
15.Asia Pacific Network Information Centre, Regional Internet Registry for the Asia-Pacific Region, 6 Cordelia Street, PO Box 3646, South Brisbane, QLD 4101, Australia22522.7%1777.3%
16.China Mobile communications corporation1,47835123.7%1,12776.3%
17.China Unicom Network1,91858530.5%1,33369.5%
18.Chinanet4,2251,40033.1%2,82566.9%
19.Alisoft5240.0%360.0%
20.BeiJing-Telecom-UserAddress-lowguaranteed9444.4%555.6%
21.Heyixinxi13646.2%753.8%
22.CERNET2 IX at Tianjin University974950.5%4849.5%
23.DMIT Inc472757.4%2042.6%
24.Zparknet48529560.8%19039.2%
25.CNC Group CHINA169 Hebei Province Network10990.0%110.0%

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 (Aug 2019)

  ISP Test count IPv6 average
1.DMIT Inc4773.2 Mbps
2.China Mobile communications corporation1,4789.1 Mbps
3.China Mobile1,2448.3 Mbps
4.Cernet2-tsinghua62306.6 Mbps
5.CERNET2 IX at Tianjin University976.1 Mbps
6.China Unicom Network1,9185.9 Mbps
7.10VPN Hosting55.0 Mbps
8.Hurricane Electric LLC1604.6 Mbps
9.China Next Generation Internet CERNET27983.7 Mbps
10.Fish-Network353.4 Mbps
11.Cngi-cernet24572.3 Mbps
12.Chinanet4,2252.0 Mbps
13.Cernet2701.7 Mbps
14.Cstnet651.3 Mbps
15.Cstnet-cnnic950.9 Mbps
16.Zparknet4850.6 Mbps
17.BEIJING ZHONGGUANCUN SOFTWARE PARK DEVELOPMENT CO., Ltd.110.0 Mbps
18.CERNET2 IX at Shanghai Jiaotong University80.0 Mbps
19.Alisoft50.0 Mbps
20.BeiJing-Telecom-UserAddress-lowguaranteed90.0 Mbps
21.Baidu60.0 Mbps
22.China-21vianet50.0 Mbps
23.Asia Pacific Network Information Centre, Regional Internet Registry for the Asia-Pacific Region, 6 Cordelia Street, PO Box 3646, South Brisbane, QLD 4101, Australia220.0 Mbps
24.China Unicom Anhui Province Network60.0 Mbps
25.Heyixinxi130.0 Mbps