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Data as of Nov 5, 2026

206.187.81.0/24

No anonymizer space · no proxy exits in 30 days

Microsoft Corporation · space held by SirsiDynix

Announcement
206.187.80.0/22
RPKI valid
Announced by
AS8075
Type
Hosting
Risk
50 / 100 · Medium
Recently moved
Recent change
New origin Oct 22, 2026
from AS1746 SirsiDynix, after 3.7 years unannounced

Registrations in this block

The registry's network records over this block, widest first, each under its parent.

RangeAddressesNetnameHolderTypeCreatedAbuse contact
206.187.0.0 - 206.187.191.25549,152SIRSIDYNIX-NET-1SirsiDynix (SC-2233) · USDirect AllocationNov 15, 1995noc@sirsidynix.com
└ 206.187.80.0/221,024SAAS-SIRSIDYNIX-NADRSAAS SirsiDynix (C11713627) · USReassignedSep 18, 2026noc@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
Announced by

Covering announcement 206.187.80.0/22

Prefix
206.187.80.0/22
Announced by
AS8075 Microsoft Corporation
Type
Hosting
RPKI
RPKI valid
Netname
SAAS-SIRSIDYNIX-NADR
Registrant
SAAS SirsiDynix
RIR
ARIN
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