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 (Jun 2018)

	ISP	IPv6 tests count
1.	Cngi-cernet2	4,296
2.	CT Networks	2,846
3.	Zsu6-cernet	1,840
4.	Lzu6-cernet2	1,263
5.	Hurricane Electric LLC	1,222
6.	Zparknet	1,198
7.	Cernet	1,187
8.	Cernet2-tsinghua6	815
9.	Buaa6-cernet2	661
10.	Pku6-cernet2	534
11.	China Unicom Network	463
12.	Hurricane Electric	445
13.	Zzu6-cernet2	399
14.	Cernet2-tju6	384
15.	Cstnet-cnnic	341
16.	Cstnet	332
17.	Chinanet-js	325
18.	Hust6-cernet	320
19.	Dlut6-cernet2	249
20.	Chinanet-gd	232
21.	Nankai6-cernet	230
22.	China Mobile	188
23.	Xidian6-cernet	187
24.	Nwpu6-cernet	180
25.	China Mobile communications corporation	173

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 2018)

	ISP	Unique IPv6 addresses
1.	Cngi-cernet2	2,965
2.	CT Networks	1,775
3.	Zsu6-cernet	1,228
4.	Lzu6-cernet2	847
5.	Cernet	777
6.	Hurricane Electric LLC	699
7.	Cernet2-tsinghua6	509
8.	Zparknet	439
9.	Buaa6-cernet2	374
10.	Pku6-cernet2	358
11.	Hurricane Electric	300
12.	Zzu6-cernet2	298
13.	China Unicom Network	290
14.	Cernet2-tju6	281
15.	Cstnet-cnnic	272
16.	Cstnet	228
17.	Chinanet-js	180
18.	Dlut6-cernet2	179
19.	Chinanet-gd	165
20.	Nankai6-cernet	164
21.	Hust6-cernet	157
22.	China Mobile communications corporation	128
23.	China Mobile	122
24.	Nwpu6-cernet	122
25.	Szu6-cernet	122

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 2018)

	ISP	Test count	IPv4	IPv4 %	IPv6	IPv6 %
1.	Cncitynet	5	0	0.0%	5	100.0%
2.	Shhj	7	0	0.0%	7	100.0%
3.	Chd6-cernet	8	0	0.0%	8	100.0%
4.	Qihoo	6	0	0.0%	6	100.0%
5.	Hrbeu6-cernet	11	0	0.0%	11	100.0%
6.	Bupt6-cernet2	11	0	0.0%	11	100.0%
7.	China Next Generation Internet CERNET2	67	3	4.5%	64	95.5%
8.	Xmu6-cernet2	100	6	6.0%	94	94.0%
9.	Bjmu6-cernet	28	2	7.1%	26	92.9%
10.	Jmu6-cernet	14	1	7.1%	13	92.9%
11.	Tyut6-cernet	13	1	7.7%	12	92.3%
12.	Xjtu6-cernet	90	9	10.0%	81	90.0%
13.	Uestc6-cernet2	63	7	11.1%	56	88.9%
14.	CERNET New Technology Co.	52	6	11.5%	46	88.5%
15.	Tencent	17	2	11.8%	15	88.2%
16.	Wasuhz	8	1	12.5%	7	87.5%
17.	Nankai6-cernet	230	30	13.0%	200	87.0%
18.	Nwu6-cernet	30	4	13.3%	26	86.7%
19.	Ahu6-cernet	36	5	13.9%	31	86.1%
20.	Ihep	7	1	14.3%	6	85.7%
21.	CTM Internet Service	54	8	14.8%	46	85.2%
22.	Cumtb6-cernet	59	9	15.3%	50	84.7%
23.	Cau6-cernet	85	14	16.5%	71	83.5%
24.	Nstuaf6-cernet	30	5	16.7%	25	83.3%
25.	Cstnet	332	57	17.2%	275	82.8%

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 2018)

	ISP	Test count	IPv6 average
1.	Hurricane Electric	445	45.5 Mbps
2.	China Unicom Network	463	35.2 Mbps
3.	China Mobile	188	35.0 Mbps
4.	China Unicom	86	31.2 Mbps
5.	Beijing Fengniao Network Technology Co	16	17.9 Mbps
6.	CTM Internet Service	54	17.7 Mbps
7.	China Unicom CHINA169 Jiangsu Province Network	12	16.5 Mbps
8.	CNC Group CHINA169 Chongqing Province Network	7	15.5 Mbps
9.	Digicore Limited	27	14.4 Mbps
10.	CT Networks	2,846	14.0 Mbps
11.	Nato Research Ltd.	5	13.6 Mbps
12.	Hurricane Electric LLC	1,222	13.6 Mbps
13.	Chinanet-sc	46	9.1 Mbps
14.	Choopa	29	8.2 Mbps
15.	Pbsl	9	4.8 Mbps
16.	Ihep	7	4.0 Mbps
17.	Chinanet-fj	41	3.2 Mbps
18.	Uestc6-cernet2	63	2.9 Mbps
19.	Chinanet-ha	14	2.9 Mbps
20.	Chinanet-gx	13	2.7 Mbps
21.	Chinanet-hb	28	2.7 Mbps
22.	CNC Group CHINA169 Tianjin Province Network	23	2.5 Mbps
23.	CHINANET jiangsu province network	34	2.4 Mbps
24.	China Unicom Guangxi Province Network	12	1.8 Mbps
25.	Chinanet-gd	232	1.7 Mbps