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 (Feb 2018)

	ISP	IPv6 tests count
1.	Cngi-cernet2	3,051
2.	Hurricane Electric	1,738
3.	Zparknet	1,435
4.	Cernet	685
5.	Pku6-cernet2	681
6.	CT Networks	675
7.	Cernet2-tsinghua6	415
8.	China Mobile communications corporation	316
9.	Chinanet-gd	301
10.	Hust6-cernet	285
11.	Cstnet-cnnic	282
12.	Buaa6-cernet2	272
13.	Cernet2-tju6	261
14.	Zsu6-cernet	232
15.	Cstnet	203
16.	China Unicom Beijing Province Network	184
17.	China Unicom	175
18.	Xidian6-cernet	154
19.	Whu6-cernet	151
20.	Xjtu6-cernet	105
21.	CNC Group CHINA169 Tianjin Province Network	100
22.	Chinanet-sh	97
23.	Dlut6-cernet2	91
24.	Chinanet-js	91
25.	Nwpu6-cernet	87

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, Feb 2018)

	ISP	Unique IPv6 addresses
1.	Cngi-cernet2	2,009
2.	Hurricane Electric	1,018
3.	Zparknet	537
4.	Pku6-cernet2	523
5.	Cernet	437
6.	CT Networks	425
7.	Cernet2-tsinghua6	280
8.	China Mobile communications corporation	221
9.	Chinanet-gd	210
10.	Cstnet-cnnic	200
11.	Buaa6-cernet2	194
12.	Cernet2-tju6	170
13.	Hust6-cernet	165
14.	Cstnet	135
15.	China Unicom Beijing Province Network	134
16.	Zsu6-cernet	130
17.	China Unicom	110
18.	Xidian6-cernet	82
19.	Chinanet-js	71
20.	Dlut6-cernet2	70
21.	Whu6-cernet	69
22.	Chinanet-sh	66
23.	Nwpu6-cernet	64
24.	Nankai6-cernet	60
25.	Xjtu6-cernet	54

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 (Feb 2018)

	ISP	Test count	IPv4	IPv4 %	IPv6	IPv6 %
1.	Hao Long	9	0	0.0%	9	100.0%
2.	Nato Research Ltd.	9	0	0.0%	9	100.0%
3.	Xtom	11	0	0.0%	11	100.0%
4.	Zzu6-cernet	6	0	0.0%	6	100.0%
5.	Jamesits	5	0	0.0%	5	100.0%
6.	Jlu6-cernet2	35	2	5.7%	33	94.3%
7.	Jmu6-cernet	48	3	6.3%	45	93.8%
8.	Fudan6-cernet2	40	3	7.5%	37	92.5%
9.	NetAssist	64	6	9.4%	58	90.6%
10.	Hrbeu6-cernet	61	6	9.8%	55	90.2%
11.	Cstnet	203	25	12.3%	178	87.7%
12.	Uestc6-cernet2	16	2	12.5%	14	87.5%
13.	Cernet2-ruc6	55	7	12.7%	48	87.3%
14.	Cer2bkb6-cernet2	39	5	12.8%	34	87.2%
15.	Xmu6-cernet2	52	7	13.5%	45	86.5%
16.	Cstnet-cnnic	282	41	14.5%	241	85.5%
17.	Pku6-cernet2	681	105	15.4%	576	84.6%
18.	Ustc6-cernet2	38	6	15.8%	32	84.2%
19.	Szuc6-cernet	55	9	16.4%	46	83.6%
20.	Buaa6-cernet2	272	45	16.5%	227	83.5%
21.	China Unicom	175	29	16.6%	146	83.4%
22.	Stu6-cernet	42	7	16.7%	35	83.3%
23.	Neu6-cernet2	76	13	17.1%	63	82.9%
24.	Lzu6-cernet2	70	12	17.1%	58	82.9%
25.	Zspnet	17	3	17.6%	14	82.4%

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 (Feb 2018)

	ISP	Test count	IPv6 average
1.	Bjmu6-cernet	25	151.7 Mbps
2.	Tsinghua6-cernet2	59	70.1 Mbps
3.	CERNET New Technology Co.	70	50.5 Mbps
4.	NetAssist	64	49.7 Mbps
5.	Cumtb6-cernet	19	47.3 Mbps
6.	Jlu6-cernet2	35	38.7 Mbps
7.	Sdu6-cernet2	30	33.5 Mbps
8.	Buaa6-cernet2	272	31.6 Mbps
9.	China Unicom Tianjin Province Network	86	29.7 Mbps
10.	China Unicom	175	25.7 Mbps
11.	Hust6-cernet	285	20.8 Mbps
12.	Pku6-cernet2	681	20.4 Mbps
13.	CNC Group CHINA169 Henan Province Network	54	19.1 Mbps
14.	Cernet2-tsinghua6	415	18.7 Mbps
15.	Cstnet	203	16.6 Mbps
16.	Chinanet-sc	71	16.6 Mbps
17.	CNC Group CHINA169 Tianjin Province Network	100	14.9 Mbps
18.	Hurricane Electric	1,738	14.8 Mbps
19.	Zsu6-cernet	232	14.7 Mbps
20.	Jmu6-cernet	48	13.4 Mbps
21.	Dlut6-cernet2	91	13.2 Mbps
22.	CHINANET jiangsu province network	30	13.1 Mbps
23.	China Unicom Liaoning Province Network	33	12.9 Mbps
24.	China Unicom Shandong Province Network	58	12.7 Mbps
25.	China Unicom CHINA169 Network	28	12.4 Mbps