AS10206 — CUZW-CN China Unicom Zhongwei Cloud
Network type: hosting
AS10206 announces 4 IPv4 prefixes covering 1,536 addresses and 2 IPv6 prefixes.
About this network
CUZW-CN is China Unicom's cloud/data-centre network in Zhongwei, Ningxia — the desert city that China turned into a national data-centre cluster on the strength of cheap power and a cold, dry climate.
What it's used for
- Cloud and colocation hosting out of the Zhongwei data-centre park, and the Unicom-side connectivity that carries it.
Notable
This is hosting, and the reverse DNS proves what the space carries rather than merely suggesting it. Sampled addresses in 69.235.184.0/21 resolve to ec2-69-235-184-5.cn-northwest-1.compute.amazonaws.com.cn — Amazon EC2 instances in the AWS China (Ningxia) region, whose physical home is Zhongwei. So this AS is announcing address space that fronts public-cloud compute, not subscribers and not a corporate office.
RIS sees 7 announced IPv4 prefixes totalling 3,584 addresses, 2 IPv6 prefixes, and 2 observed neighbours. Two neighbours confirms it is not a carrier — Unicom's transit business runs on other ASNs; this one is a leaf that exists to originate the cloud campus's space.
Remember what rDNS does and does not say: the PTRs establish that AWS China workloads live here, not that Amazon holds the network. AWS's China regions are operated by licensed local partners over Chinese carrier infrastructure, which is precisely the arrangement this AS is a piece of.
Interesting
69.235.184.0/21 is legacy ARIN-region IPv4 — North American space — carrying EC2 instances inside China. The IPv6 announcements, by contrast, are straightforward China Unicom blocks out of 2408::/16.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.
Announced prefixes
- 103.251.240.0/23
- 116.129.224.0/24
- 116.129.226.0/24
- 116.129.242.0/23
- 2408:8001:e800::/37
- 2408:8779::/34
Upstream networks
- AS4837 CHINA UNICOM China169 Backbone
Downstream networks
- AS135629 Ningxia West Cloud Data Technology Co.Ltd.
Adjacent networks
awaiting query
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