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 (Nov 2019)

	ISP	IPv6 tests count
1.	China Unicom Network	2,926
2.	China Mobile communications corporation	1,898
3.	China Mobile	1,528
4.	China Next Generation Internet CERNET2	806
5.	Chinanet	584
6.	Cngi-cernet2	495
7.	Zparknet	270
8.	Cernet	242
9.	Hurricane Electric LLC	93
10.	Baidu	72
11.	Cernet2-tsinghua6	62
12.	Cstnet	49
13.	CERNET2 IX at Tianjin University	47
14.	DMIT Inc	35
15.	BeiJing-Telecom-UserAddress-lowguaranteed	34
16.	Cstnet-cnnic	32
17.	CERNET2 IX at Shanghai Jiaotong University	18
18.	Kuaishou-kj	18
19.	Hosteons Pte. Ltd	16
20.	CNC Group CHINA169 Henan Province Network	14
21.	China Unicom Henan Province Network	12
22.	Guangzhou NetEase Computer System Co., Ltd.	8
23.	CTM Internet Service	6
24.	China Unicom Anhui Province Network	6

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, Nov 2019)

	ISP	Unique IPv6 addresses
1.	China Unicom Network	2,210
2.	China Mobile communications corporation	1,406
3.	China Mobile	1,137
4.	China Next Generation Internet CERNET2	629
5.	Chinanet	400
6.	Cngi-cernet2	368
7.	Cernet	178
8.	Zparknet	152
9.	Hurricane Electric LLC	72
10.	Cernet2-tsinghua6	54
11.	Cstnet	42
12.	Baidu	34
13.	CERNET2 IX at Tianjin University	34
14.	Cstnet-cnnic	28
15.	DMIT Inc	20
16.	BeiJing-Telecom-UserAddress-lowguaranteed	19
17.	CERNET2 IX at Shanghai Jiaotong University	16
18.	Kuaishou-kj	14
19.	CNC Group CHINA169 Henan Province Network	5
20.	Guangzhou NetEase Computer System Co., Ltd.	4
21.	China Unicom Anhui Province Network	4
22.	China Unicom Henan Province Network	4
23.	CTM Internet Service	3
24.	Hosteons Pte. Ltd	1

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 (Nov 2019)

	ISP	Test count	IPv4	IPv4 %	IPv6	IPv6 %
1.	Cstnet	49	5	10.2%	44	89.8%
2.	CERNET2 IX at Shanghai Jiaotong University	18	2	11.1%	16	88.9%
3.	Hurricane Electric LLC	93	12	12.9%	81	87.1%
4.	Cngi-cernet2	495	106	21.4%	389	78.6%
5.	Cernet	242	52	21.5%	190	78.5%
6.	Cstnet-cnnic	32	7	21.9%	25	78.1%
7.	China Mobile communications corporation	1,898	425	22.4%	1,473	77.6%
8.	China Next Generation Internet CERNET2	806	181	22.5%	625	77.5%
9.	China Mobile	1,528	347	22.7%	1,181	77.3%
10.	Guangzhou NetEase Computer System Co., Ltd.	8	2	25.0%	6	75.0%
11.	CERNET2 IX at Tianjin University	47	12	25.5%	35	74.5%
12.	Kuaishou-kj	18	5	27.8%	13	72.2%
13.	China Unicom Network	2,926	849	29.0%	2,077	71.0%
14.	Hosteons Pte. Ltd	16	5	31.3%	11	68.8%
15.	Cernet2-tsinghua6	62	21	33.9%	41	66.1%
16.	Baidu	72	25	34.7%	47	65.3%
17.	Chinanet	584	235	40.2%	349	59.8%
18.	BeiJing-Telecom-UserAddress-lowguaranteed	34	16	47.1%	18	52.9%
19.	CTM Internet Service	6	3	50.0%	3	50.0%
20.	Zparknet	270	152	56.3%	118	43.7%
21.	DMIT Inc	35	24	68.6%	11	31.4%
22.	CNC Group CHINA169 Henan Province Network	14	14	100.0%	0	0.0%
23.	China Unicom Anhui Province Network	6	6	100.0%	0	0.0%
24.	China Unicom Henan Province Network	12	12	100.0%	0	0.0%

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 (Nov 2019)

	ISP	Test count	IPv6 average
1.	DMIT Inc	35	19.9 Mbps
2.	China Mobile	1,528	10.1 Mbps
3.	China Mobile communications corporation	1,898	7.4 Mbps
4.	China Unicom Network	2,926	6.0 Mbps
5.	Chinanet	584	0.9 Mbps
6.	Kuaishou-kj	18	0.5 Mbps
7.	China Next Generation Internet CERNET2	806	0.2 Mbps
8.	Cstnet-cnnic	32	0.1 Mbps
9.	Cernet	242	0.1 Mbps
10.	Cngi-cernet2	495	0.1 Mbps
11.	Cstnet	49	0.1 Mbps
12.	Zparknet	270	0.1 Mbps
13.	CERNET2 IX at Shanghai Jiaotong University	18	0.1 Mbps
14.	Cernet2-tsinghua6	62	0.1 Mbps
15.	CERNET2 IX at Tianjin University	47	0.0 Mbps
16.	Baidu	72	0.0 Mbps
17.	BeiJing-Telecom-UserAddress-lowguaranteed	34	0.0 Mbps
18.	Hurricane Electric LLC	93	0.0 Mbps
19.	Hosteons Pte. Ltd	16	0.0 Mbps
20.	Guangzhou NetEase Computer System Co., Ltd.	8	0.0 Mbps
21.	CTM Internet Service	6	0.0 Mbps
22.	CNC Group CHINA169 Henan Province Network	14	0.0 Mbps
23.	China Unicom Anhui Province Network	6	0.0 Mbps
24.	China Unicom Henan Province Network	12	0.0 Mbps