AS58593 — BLUECLOUD Shanghai Blue Cloud Technology Co.,Ltd

AS58593 announces 12 IPv4 prefixes covering 771,072 addresses and 2 IPv6 prefixes.

About this network

Shanghai Blue Cloud Technology Co., Ltd (BLUECLOUD) operates the network behind Microsoft Azure's China regions, which are run locally under a Chinese partner rather than by Microsoft directly.

What it's used for

• Public cloud hosting and compute for Azure customers within China (Azure China / China East and related regions).

Notable

• This is a cloud/hosting network, not a consumer mobile carrier — addresses here front datacenter and cloud workloads, not end-user handsets.
• China's regulatory model requires foreign cloud providers to operate through a domestic partner, which is why Azure China sits under a separate operator.

Interesting

• Running Azure in China through a local entity keeps the service inside China's regulatory and data-residency framework, isolated from Microsoft's global cloud ASNs.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 40.72.0.0/15
• 40.125.128.0/17
• 40.126.64.0/18
• 40.162.0.0/16
• 42.159.0.0/16
• 52.130.0.0/15
• 103.9.8.0/22
• 139.217.0.0/16
• 139.219.0.0/16
• 143.64.0.0/16
• 159.27.0.0/16
• 163.228.0.0/16
• 2404:7940::/32
• 2406:e500::/33

Upstream networks

• AS8075 Microsoft Corporation
• AS4811 China Telecom (Group)
• AS4808 China Unicom Beijing Province Network
• AS17621 China Unicom Shanghai network
• AS23724 IDC, China Telecommunications Corporation

Adjacent networks

• AS8075 Microsoft Corporation
• AS4811 China Telecom (Group)
• AS4808 China Unicom Beijing Province Network
• AS17621 China Unicom Shanghai network
• AS23724 IDC, China Telecommunications Corporation