AS5761 — MICROSOFT-CORP-MSN-AS-SATURN

AS5761 announces 1 IPv4 prefixes covering 256 addresses and 1 IPv6 prefixes.

About this network

MICROSOFT-CORP-MSN-AS-SATURN is one of Microsoft's smaller autonomous systems, registered to Microsoft Corporation in Redmond, Washington.

What it's used for

• A single announced IPv4 /24 drawn from Microsoft's long-held corporate range, plus an IPv6 /48. This is an edge or special-purpose AS, not the network that carries Azure or Microsoft's consumer services.

Notable

• Microsoft runs a family of ASNs rather than one. The bulk of its traffic rides its main global network, so a 256-address AS like this one is a corner of the estate rather than a representative sample of it.
• The prefix sits inside Microsoft's own registered corporate address space, so these addresses are company infrastructure rather than customer or tenant space.

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

Announced prefixes

• 157.58.216.0/24
• 2001:4898:b080::/48

Upstream networks

• AS8075 Microsoft Corporation

Adjacent networks

• AS8075 Microsoft Corporation