IPv6 test - Statistics for 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 2019)

	ISP	IPv6 tests count
1.	China Mobile	3,933
2.	Chinanet	3,819
3.	China Unicom Network	2,018
4.	China Mobile communications corporation	1,762
5.	China Next Generation Internet CERNET2	662
6.	Cngi-cernet2	400
7.	Zparknet	310
8.	Cernet	280
9.	Hurricane Electric LLC	190
10.	Cstnet	136
11.	Cernet2-tsinghua6	73
12.	CERNET2 IX at Tianjin University	40
13.	Cstnet-cnnic	31
14.	DMIT Inc	27
15.	Fish-Network	16
16.	China-21vianet	14
17.	CTM Internet Service	10
18.	Qihoo	8
19.	Baidu	8
20.	CERNET2 IX at Shanghai Jiaotong University	7
21.	Heyixinxi	6
22.	Jiangsu Network of ChinaTelecom	6
23.	Ihep	6
24.	ZhengZhou GIANT Computer Network Technology Co., Ltd	5
25.	Hosteons Pte. 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, Jul 2019)

	ISP	Unique IPv6 addresses
1.	Chinanet	2,466
2.	China Unicom Network	1,408
3.	China Mobile communications corporation	1,197
4.	China Mobile	1,108
5.	China Next Generation Internet CERNET2	420
6.	Cngi-cernet2	297
7.	Cernet	198
8.	Zparknet	157
9.	Hurricane Electric LLC	141
10.	Cstnet	65
11.	Cernet2-tsinghua6	50
12.	CERNET2 IX at Tianjin University	25
13.	Cstnet-cnnic	18
14.	DMIT Inc	17
15.	CTM Internet Service	9
16.	CERNET2 IX at Shanghai Jiaotong University	7
17.	Heyixinxi	6
18.	Baidu	6
19.	China-21vianet	5
20.	Ihep	5
21.	CHINANET Guangdong province Shenzhen MAN network	5
22.	Fish-Network	4
23.	Jiangsu Network of ChinaTelecom	4
24.	Qihoo	4
25.	CERNET New Technology Co	4

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 2019)

	ISP	Test count	IPv4	IPv4 %	IPv6	IPv6 %
1.	CERNET New Technology Co	5	0	0.0%	5	100.0%
2.	Baidu	8	0	0.0%	8	100.0%
3.	China-21vianet	14	0	0.0%	14	100.0%
4.	CTM Internet Service	10	0	0.0%	10	100.0%
5.	Hurricane Electric LLC	190	21	11.1%	169	88.9%
6.	Qihoo	8	1	12.5%	7	87.5%
7.	China Mobile	3,933	557	14.2%	3,376	85.8%
8.	Cstnet-cnnic	31	5	16.1%	26	83.9%
9.	Cstnet	136	23	16.9%	113	83.1%
10.	Cngi-cernet2	400	79	19.8%	321	80.3%
11.	Cernet	280	57	20.4%	223	79.6%
12.	China Mobile communications corporation	1,762	371	21.1%	1,391	78.9%
13.	China Next Generation Internet CERNET2	662	140	21.1%	522	78.9%
14.	Cernet2-tsinghua6	73	19	26.0%	54	74.0%
15.	China Unicom Network	2,018	616	30.5%	1,402	69.5%
16.	Fish-Network	16	5	31.3%	11	68.8%
17.	Chinanet	3,819	1,288	33.7%	2,531	66.3%
18.	Hosteons Pte. Ltd	5	2	40.0%	3	60.0%
19.	CERNET2 IX at Tianjin University	40	17	42.5%	23	57.5%
20.	CERNET2 IX at Shanghai Jiaotong University	7	3	42.9%	4	57.1%
21.	Ihep	6	3	50.0%	3	50.0%
22.	Heyixinxi	6	3	50.0%	3	50.0%
23.	ZhengZhou GIANT Computer Network Technology Co., Ltd	5	3	60.0%	2	40.0%
24.	Zparknet	310	215	69.4%	95	30.6%
25.	CHINANET Guangdong province Foshan MAN network	5	4	80.0%	1	20.0%

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 2019)

	ISP	Test count	IPv6 average
1.	Qihoo	8	35.8 Mbps
2.	Ihep	6	17.4 Mbps
3.	DMIT Inc	27	16.1 Mbps
4.	Fish-Network	16	12.0 Mbps
5.	ZhengZhou GIANT Computer Network Technology Co., Ltd	5	11.5 Mbps
6.	Hurricane Electric LLC	190	11.0 Mbps
7.	China Mobile	3,933	7.1 Mbps
8.	Cstnet-cnnic	31	6.1 Mbps
9.	China Mobile communications corporation	1,762	4.0 Mbps
10.	Cernet2-tsinghua6	73	3.9 Mbps
11.	China Unicom Network	2,018	3.7 Mbps
12.	Cstnet	136	2.2 Mbps
13.	Cernet	280	2.1 Mbps
14.	Cngi-cernet2	400	1.5 Mbps
15.	China Next Generation Internet CERNET2	662	1.4 Mbps
16.	CERNET2 IX at Shanghai Jiaotong University	7	1.0 Mbps
17.	Zparknet	310	1.0 Mbps
18.	Chinanet	3,819	0.8 Mbps
19.	CERNET2 IX at Tianjin University	40	0.6 Mbps
20.	CERNET New Technology Co	5	0.5 Mbps
21.	CTM Internet Service	10	0.0 Mbps
22.	Jiangsu Network of ChinaTelecom	6	0.0 Mbps
23.	China-21vianet	14	0.0 Mbps
24.	Heyixinxi	6	0.0 Mbps
25.	Hosteons Pte. Ltd	5	0.0 Mbps