LAYER3 INTEL
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Data as of Nov 6, 2026

206.203.91.0/24

No anonymizer space · no proxy exits in 30 days

Microsoft Corporation · space held by McKesson Corp.

Announcement
this exact prefix
RPKI valid
Announced by
AS8075
Type
Hosting
Risk
50 / 100 · Medium

Announcements

Less specific

Covering announcements

PrefixOriginTypeHolderRPKI
206.203.64.0/18
since Aug 2026
AS203BusinessMcKesson Corp.

Registrations in this block

The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
206.203.64.0/1816,384CPG-REMOTEMcKesson Corp. (MCKESS) · USDirect AllocationAug 2, 1995NetworkInfrastructureTeam2@mckesson.com
└ 206.203.91.0/24256MCK-US-AZW3-ALK2Mckesson Corp. (C11428361) · USReassignedNov 20, 2025NetworkInfrastructureTeam2@mckesson.com
via CPG-REMOTE

A contact marked “via” is the registry's: the record names none of its own, so the registry hands down its parent's.

Network & registry

AnnouncementRouting historyRPKI & IRRWhois & abuse
Registry

Holder

Organization
McKesson Corp.
Handle
MCKESS
Range
206.203.64.0/18
Registration type
Direct Allocation
Record created
Aug 2, 1995
Legacy
yes
Origin network

AS8075

US
Name
Microsoft Corporation
Type
Hosting
Registered
Mar 31, 1997
Domain
microsoft.com
Website
www.microsoft.com
Industry
Software Development
Spamhaus ASN-DROP
not listed