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 2018)

	ISP	IPv6 tests count
1.	CT Networks	4,929
2.	China Unicom Network	4,881
3.	China Mobile	3,118
4.	China Next Generation Internet CERNET2	1,703
5.	Cngi-cernet2	1,474
6.	Cernet	613
7.	Hurricane Electric LLC	422
8.	Zparknet	396
9.	Cernet2-tsinghua6	301
10.	Cstnet-cnnic	214
11.	Cstnet	158
12.	CERNET2 IX at Tianjin University	104
13.	No.31, Jin-rong Street	91
14.	Wowrack.com	56
15.	China Mobile communications corporation	56
16.	Hurricane Electric	52
17.	Us-dmitinc	43
18.	CTM Internet Service	38
19.	CERNET New Technology Co	28
20.	CERNET2 IX at Peking University	25
21.	ZhengZhou GIANT Computer Network Technology Co., Ltd	21
22.	CERNET2 IX at Shanghai Jiaotong University	21
23.	China Unicom Beijing Province Network	15
24.	Ihep	13
25.	Heyixinxi	11

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 2018)

	ISP	Unique IPv6 addresses
1.	CT Networks	3,443
2.	China Unicom Network	3,198
3.	China Mobile	2,273
4.	China Next Generation Internet CERNET2	1,184
5.	Cngi-cernet2	926
6.	Cernet	397
7.	Hurricane Electric LLC	215
8.	Cernet2-tsinghua6	197
9.	Zparknet	190
10.	Cstnet-cnnic	141
11.	Cstnet	126
12.	CERNET2 IX at Tianjin University	70
13.	No.31, Jin-rong Street	68
14.	China Mobile communications corporation	39
15.	Hurricane Electric	33
16.	CTM Internet Service	28
17.	Us-dmitinc	19
18.	CERNET2 IX at Peking University	18
19.	ZhengZhou GIANT Computer Network Technology Co., Ltd	14
20.	CERNET New Technology Co	14
21.	CERNET2 IX at Shanghai Jiaotong University	13
22.	Heyixinxi	11
23.	Ihep	11
24.	China Unicom Beijing Province Network	10
25.	China Telecom (Group)	7

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 2018)

	ISP	Test count	IPv4	IPv4 %	IPv6	IPv6 %
1.	Wowrack.com	56	0	0.0%	56	100.0%
2.	Ihep	13	0	0.0%	13	100.0%
3.	Heyixinxi	11	1	9.1%	10	90.9%
4.	CERNET New Technology Co	28	3	10.7%	25	89.3%
5.	OVH Hosting	8	1	12.5%	7	87.5%
6.	Cstnet	158	20	12.7%	138	87.3%
7.	Hurricane Electric LLC	422	60	14.2%	362	85.8%
8.	15F, Ideal Plaza No.58 Bei Si Huan Xi Road	7	1	14.3%	6	85.7%
9.	Cstnet-cnnic	214	35	16.4%	179	83.6%
10.	ARTERIA Networks Corporation	6	1	16.7%	5	83.3%
11.	Cernet	613	116	18.9%	497	81.1%
12.	ZhengZhou GIANT Computer Network Technology Co., Ltd	21	4	19.0%	17	81.0%
13.	CERNET2 IX at Shanghai Jiaotong University	21	4	19.0%	17	81.0%
14.	China Unicom Network	4,881	1,037	21.2%	3,844	78.8%
15.	China Next Generation Internet CERNET2	1,703	371	21.8%	1,332	78.2%
16.	Cernet2-tsinghua6	301	66	21.9%	235	78.1%
17.	China Mobile	3,118	711	22.8%	2,407	77.2%
18.	Cngi-cernet2	1,474	355	24.1%	1,119	75.9%
19.	Guangdong Cable Corporation Limited	8	2	25.0%	6	75.0%
20.	CERNET2 IX at Peking University	25	7	28.0%	18	72.0%
21.	CT Networks	4,929	1,430	29.0%	3,499	71.0%
22.	CTM Internet Service	38	12	31.6%	26	68.4%
23.	Hurricane Electric	52	17	32.7%	35	67.3%
24.	CERNET2 IX at Tianjin University	104	40	38.5%	64	61.5%
25.	CERNET Content Delivery Network	9	4	44.4%	5	55.6%

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 2018)

	ISP	Test count	IPv6 average
1.	CT Networks	4,929	21.0 Mbps
2.	Ihep	13	18.9 Mbps
3.	Hurricane Electric LLC	422	15.1 Mbps
4.	China Unicom Network	4,881	10.8 Mbps
5.	Us-dmitinc	43	9.6 Mbps
6.	China Mobile communications corporation	56	9.6 Mbps
7.	No.31, Jin-rong Street	91	8.7 Mbps
8.	China Mobile	3,118	5.4 Mbps
9.	ARTERIA Networks Corporation	6	2.8 Mbps
10.	Cstnet-cnnic	214	0.8 Mbps
11.	Cernet2-tsinghua6	301	0.7 Mbps
12.	Cngi-cernet2	1,474	0.7 Mbps
13.	Cernet	613	0.5 Mbps
14.	China Unicom Beijing Province Network	15	0.4 Mbps
15.	Cstnet	158	0.2 Mbps
16.	China Telecom (Group)	11	0.2 Mbps
17.	Zparknet	396	0.1 Mbps
18.	China Next Generation Internet CERNET2	1,703	0.1 Mbps
19.	CERNET New Technology Co	28	0.1 Mbps
20.	CERNET2 IX at Tianjin University	104	0.1 Mbps
21.	ZhengZhou GIANT Computer Network Technology Co., Ltd	21	0.1 Mbps
22.	CERNET2 IX at Peking University	25	0.1 Mbps
23.	Wowrack.com	56	0.0 Mbps
24.	China Unicom CHINA169 Hunan Province Network	5	0.0 Mbps
25.	CERNET Content Delivery Network	9	0.0 Mbps