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 2019)

  ISP IPv6 tests count
1.Chinanet2,672
2.China Unicom Network1,863
3.China Mobile communications corporation1,244
4.China Next Generation Internet CERNET21,062
5.China Mobile928
6.Cngi-cernet2692
7.Cernet435
8.Zparknet254
9.Hurricane Electric LLC164
10.Cernet2-tsinghua696
11.CERNET2 IX at Tianjin University68
12.Cstnet67
13.DMIT Inc56
14.Cstnet-cnnic29
15.Heyixinxi15
16.Shenzhen Tencent Computer Systems Company Limited15
17.CTM Internet Service14
18.CERNET2 IX at Shanghai Jiaotong University11
19.Hostus-hkg10
20.CERNET2 IX at Zhejiang University10
21.Fish-Network8
22.CHINANET Guangdong province Shenzhen MAN network8
23.CHINANET Guangdong province Foshan MAN network8
24.Hosteons Pte. Ltd6
25.Nato Research Ltd.5

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 2019)

  ISP Unique IPv6 addresses
1.Chinanet1,823
2.China Unicom Network1,268
3.China Mobile communications corporation844
4.China Next Generation Internet CERNET2770
5.China Mobile688
6.Cngi-cernet2443
7.Cernet283
8.Zparknet128
9.Hurricane Electric LLC120
10.Cernet2-tsinghua670
11.Cstnet48
12.CERNET2 IX at Tianjin University39
13.Cstnet-cnnic25
14.DMIT Inc22
15.CTM Internet Service12
16.CERNET2 IX at Shanghai Jiaotong University10
17.Heyixinxi10
18.CHINANET Guangdong province Shenzhen MAN network7
19.Fish-Network6
20.Guangzhou NetEase Computer System Co., Ltd.5
21.Nato Research Ltd.4
22.Hosteons Pte. Ltd3
23.CHINANET Guangdong province Foshan MAN network3
24.Hostus-hkg1
25.CERNET2 IX at Zhejiang University1

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 2019)

  ISP Test count IPv4 IPv4 % IPv6 IPv6 %
1.Hostus-hkg1000.0%10100.0%
2.Guangzhou NetEase Computer System Co., Ltd.500.0%5100.0%
3.Fish-Network800.0%8100.0%
4.CERNET2 IX at Zhejiang University1000.0%10100.0%
5.Hurricane Electric LLC1642213.4%14286.6%
6.Hosteons Pte. Ltd6116.7%583.3%
7.Cernet2-tsinghua6961919.8%7780.2%
8.China Mobile communications corporation1,24425220.3%99279.7%
9.Cstnet671420.9%5379.1%
10.Cernet4359221.1%34378.9%
11.China Mobile92820221.8%72678.2%
12.China Next Generation Internet CERNET21,06223522.1%82777.9%
13.Cngi-cernet269216624.0%52676.0%
14.Cstnet-cnnic29724.1%2275.9%
15.CTM Internet Service14428.6%1071.4%
16.Heyixinxi15533.3%1066.7%
17.China Unicom Network1,86364234.5%1,22165.5%
18.Chinanet2,6721,18444.3%1,48855.7%
19.CERNET2 IX at Tianjin University683247.1%3652.9%
20.DMIT Inc563257.1%2442.9%
21.Nato Research Ltd.5360.0%240.0%
22.CERNET2 IX at Shanghai Jiaotong University11763.6%436.4%
23.Zparknet25416364.2%9135.8%
24.CHINANET Guangdong province Shenzhen MAN network8787.5%112.5%
25.CHINANET Guangdong province Foshan MAN network88100.0%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 (Jun 2019)

  ISP Test count IPv6 average
1.China Mobile92811.3 Mbps
2.DMIT Inc567.5 Mbps
3.China Mobile communications corporation1,2447.1 Mbps
4.China Unicom Network1,8633.7 Mbps
5.China Next Generation Internet CERNET21,0621.1 Mbps
6.Cngi-cernet26921.0 Mbps
7.Chinanet2,6721.0 Mbps
8.CHINANET Guangdong province Shenzhen MAN network80.4 Mbps
9.Cernet2-tsinghua6960.3 Mbps
10.Cernet4350.1 Mbps
11.Zparknet2540.1 Mbps
12.Cstnet670.1 Mbps
13.CERNET2 IX at Shanghai Jiaotong University110.1 Mbps
14.CERNET2 IX at Tianjin University680.1 Mbps
15.Hurricane Electric LLC1640.0 Mbps
16.Guangzhou NetEase Computer System Co., Ltd.50.0 Mbps
17.CERNET2 IX at Zhejiang University100.0 Mbps
18.Heyixinxi150.0 Mbps
19.Hostus-hkg100.0 Mbps
20.Hosteons Pte. Ltd60.0 Mbps
21.Nato Research Ltd.50.0 Mbps
22.CHINANET Guangdong province Foshan MAN network80.0 Mbps
23.Cstnet-cnnic290.0 Mbps
24.CTM Internet Service140.0 Mbps
25.Fish-Network80.0 Mbps