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 (Sep 2018)

	ISP	IPv6 tests count
1.	China Unicom Network	6,161
2.	CT Networks	5,107
3.	China Mobile	3,660
4.	China Next Generation Internet CERNET2	2,698
5.	Cngi-cernet2	1,913
6.	Zparknet	621
7.	Cernet	609
8.	Hurricane Electric LLC	324
9.	Cernet2-tsinghua6	292
10.	Cstnet	272
11.	Cstnet-cnnic	208
12.	No.31, Jin-rong Street	207
13.	CERNET2 IX at Tianjin University	166
14.	China Mobile communications corporation	85
15.	Hurricane Electric	68
16.	CERNET2 IX at Peking University	39
17.	China Unicom Beijing Province Network	36
18.	ZhengZhou GIANT Computer Network Technology Co., Ltd	33
19.	CERNET2 IX at Shanghai Jiaotong University	32
20.	Chinacache	29
21.	China Telecom (Group)	25
22.	CERNET New Technology Co	23
23.	CTM Internet Service	15
24.	Us-dmitinc	15
25.	15F, Ideal Plaza No.58 Bei Si Huan Xi Road	14

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, Sep 2018)

	ISP	Unique IPv6 addresses
1.	China Unicom Network	4,120
2.	CT Networks	3,330
3.	China Mobile	2,541
4.	China Next Generation Internet CERNET2	1,818
5.	Cngi-cernet2	1,263
6.	Cernet	351
7.	Zparknet	249
8.	Cernet2-tsinghua6	208
9.	Hurricane Electric LLC	207
10.	Cstnet	190
11.	Cstnet-cnnic	160
12.	No.31, Jin-rong Street	133
13.	CERNET2 IX at Tianjin University	107
14.	China Mobile communications corporation	60
15.	CERNET2 IX at Peking University	30
16.	CERNET2 IX at Shanghai Jiaotong University	27
17.	Hurricane Electric	25
18.	China Unicom Beijing Province Network	25
19.	China Telecom (Group)	15
20.	CERNET New Technology Co	14
21.	CTM Internet Service	12
22.	15F, Ideal Plaza No.58 Bei Si Huan Xi Road	12
23.	ZhengZhou GIANT Computer Network Technology Co., Ltd	11
24.	Us-dmitinc	10
25.	Heyixinxi	8

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 (Sep 2018)

	ISP	Test count	IPv4	IPv4 %	IPv6	IPv6 %
1.	15F, Ideal Plaza No.58 Bei Si Huan Xi Road	14	0	0.0%	14	100.0%
2.	ARTERIA Networks Corporation	6	0	0.0%	6	100.0%
3.	Guangdong Cable Corporation Limited	10	0	0.0%	10	100.0%
4.	Linode	5	0	0.0%	5	100.0%
5.	shuiM Data Exchange Center	7	0	0.0%	7	100.0%
6.	CTM Internet Service	15	1	6.7%	14	93.3%
7.	Heyixinxi	8	1	12.5%	7	87.5%
8.	Hurricane Electric	68	9	13.2%	59	86.8%
9.	Ihep	7	1	14.3%	6	85.7%
10.	Cstnet-cnnic	208	37	17.8%	171	82.2%
11.	China Unicom Network	6,161	1,142	18.5%	5,019	81.5%
12.	CERNET2 IX at Peking University	39	8	20.5%	31	79.5%
13.	Hurricane Electric LLC	324	67	20.7%	257	79.3%
14.	Chinacache	29	6	20.7%	23	79.3%
15.	Cstnet	272	57	21.0%	215	79.0%
16.	Cngi-cernet2	1,913	410	21.4%	1,503	78.6%
17.	CERNET New Technology Co	23	5	21.7%	18	78.3%
18.	CT Networks	5,107	1,112	21.8%	3,995	78.2%
19.	China Mobile	3,660	797	21.8%	2,863	78.2%
20.	CERNET2 IX at Shanghai Jiaotong University	32	7	21.9%	25	78.1%
21.	China Next Generation Internet CERNET2	2,698	667	24.7%	2,031	75.3%
22.	Cernet2-tsinghua6	292	77	26.4%	215	73.6%
23.	CERNET2 IX at Tianjin University	166	47	28.3%	119	71.7%
24.	Cernet	609	180	29.6%	429	70.4%
25.	Digicore Limited	6	2	33.3%	4	66.7%

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 (Sep 2018)

	ISP	Test count	IPv6 average
1.	CERNET New Technology Co	23	58.5 Mbps
2.	Us-dmitinc	15	23.4 Mbps
3.	CT Networks	5,107	17.4 Mbps
4.	China Unicom Network	6,161	10.5 Mbps
5.	Cernet	609	6.3 Mbps
6.	CERNET2 IX at Peking University	39	5.6 Mbps
7.	Cngi-cernet2	1,913	4.7 Mbps
8.	China Mobile	3,660	4.0 Mbps
9.	CERNET2 IX at Shanghai Jiaotong University	32	3.7 Mbps
10.	China Next Generation Internet CERNET2	2,698	3.6 Mbps
11.	Cstnet	272	2.6 Mbps
12.	Cernet2-tsinghua6	292	1.7 Mbps
13.	Cstnet-cnnic	208	1.6 Mbps
14.	China Mobile communications corporation	85	1.6 Mbps
15.	CERNET2 IX at Tianjin University	166	1.5 Mbps
16.	Ihep	7	1.0 Mbps
17.	China Unicom Beijing Province Network	36	0.8 Mbps
18.	ZhengZhou GIANT Computer Network Technology Co., Ltd	33	0.7 Mbps
19.	Zparknet	621	0.5 Mbps
20.	CNC Group CHINA169 Shandong Province Network	6	0.5 Mbps
21.	No.31, Jin-rong Street	207	0.3 Mbps
22.	China Unicom CHINA169 Network	7	0.3 Mbps
23.	shuiM Data Exchange Center	7	0.3 Mbps
24.	China Telecom (Group)	25	0.2 Mbps
25.	21Vianet.Co., Ltd	9	0.1 Mbps