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Data as of Nov 5, 2026

206.187.52.0/22

No anonymizer space · no proxy exits in 30 days

Microsoft Corporation · space held by SirsiDynix

Announcement
this exact prefix
RPKI valid
Announced by
AS8075
Type
Hosting
Risk
50 / 100 · Medium
Recently moved
Recent change
New origin Oct 16, 2026
from AS20860 Iomart Cloud Services Limited

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
206.187.0.0 - 206.187.191.25549,152SIRSIDYNIX-NET-1SirsiDynix (SC-2233) · USDirect AllocationNov 15, 1995noc@sirsidynix.com
└ 206.187.52.0/221,024SAAS-SIRSIDYNIX-UNITED-KINGDOMSAAS SirsiDynix United Kingdom (C04670737) · GBReassignedAug 14, 2013noc@sirsidynix.com
via SIRSIDYNIX-NET-1

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
SirsiDynix
Handle
SC-2233
Range
206.187.0.0 - 206.187.191.255
Registration type
Direct Allocation
Record created
Nov 15, 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