If you are scraping this block for the prefixes that a AS originates, please use the data dumps in https://bgp.tools/kb/api and cache them

	Prefix	Description
	151.207.40.0/22	United States Patent and Trademark Office
	151.207.44.0/22	United States Patent and Trademark Office
	170.110.229.0/24	U.S. Department of Commerce, HQ and ITA
	2608:1c1:6::/48	United States Department of Defense (DoD)
	2608:1c1:7::/48	United States Department of Defense (DoD)
	2608:1c1:8::/48	United States Department of Defense (DoD)

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS5852	United States Department of Defense (DoD)	✘	✔
	AS3477	National Oceanic and Atmospheric Administration	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS5852	United States Department of Defense (DoD)	✘	✔
	AS3477	National Oceanic and Atmospheric Administration	✔	✘

ASHandle:       AS12076
OrgID:          MSFT
ASName:         MICROSOFT
ASNumber:       12076
RegDate:        1999-03-16
Updated:        2015-02-23
Source:         ARIN



OrgID:          MSFT
OrgName:        Microsoft Corporation
CanAllocate:    
Street:         One Microsoft Way
City:           Redmond
State/Prov:     WA
Country:        US
PostalCode:     98052
Comment:        To report suspected security issues specific to traffic emanating from Microsoft online services, including the distribution of malicious content or other illicit or illegal material through a Microsoft online service, please submit reports to:
Comment:        * https://cert.microsoft.com.  
Comment:        For SPAM and other abuse issues, such as Microsoft Accounts, please contact:
Comment:        * abuse@microsoft.com.  
Comment:        To report security vulnerabilities in Microsoft products and services, please contact:
Comment:        * secure@microsoft.com.  
Comment:        For legal and law enforcement-related requests, please contact:
Comment:        * msndcc@microsoft.com
Comment:        For routing, peering or DNS issues, please 
Comment:        contact:
Comment:        * IOC@microsoft.com
RegDate:        1998-07-10
Updated:        2025-06-10
OrgAdminHandle: IPHOS5-ARIN
OrgTechHandle:  BEDAR6-ARIN
OrgTechHandle:  IPHOS5-ARIN
OrgTechHandle:  MRPD-ARIN
OrgTechHandle:  SINGH683-ARIN
OrgAbuseHandle: MAC74-ARIN
OrgRoutingHandle:   CHATU3-ARIN
Source:         ARIN





OrgAdminHandle:       IPHOS5-ARIN
OrgAdminName:         IPHostmaster IPHostmaster
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        BEDAR6-ARIN
OrgTechName:          Dawn Bedard
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        IPHOS5-ARIN
OrgTechName:          IPHostmaster IPHostmaster
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        MRPD-ARIN
OrgTechName:           Microsoft Routing, Peering, and DNS
# Email removed, Log into bgp.tools to see whois emails


OrgTechHandle:        SINGH683-ARIN
OrgTechName:          Prachi Singh
# Email removed, Log into bgp.tools to see whois emails


OrgAbuseHandle:       MAC74-ARIN
OrgAbuseName:          Microsoft Abuse Contact
# Email removed, Log into bgp.tools to see whois emails


OrgRoutingHandle:     CHATU3-ARIN
OrgRoutingName:       Somesh Chaturmohta
# Email removed, Log into bgp.tools to see whois emails

Last Update: 2026-03-13T03:25:45Z UTC

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Member of the following AS-SETs

-	Member
RADB	as-chief-transit
RIPE	as-qtel-set
APNIC	as37996:as-peering
BELL	as-gtpeers
RADB	as7575:as-peer
RADB	as-emix
RIPE	as-mfnx
LEVEL3	as-lumen-customers-asns
ARIN	as-3477-all
RIPE	as-swcm-martians-accept
ARIN	as32413:as-peers
RADB	as-optus
RADB	as-anc-customer-proxy-register
RADB	as-hinet
RADB	as-3477-all
RADB	as3491:as-customers-ap
RIPE	as-tww
ALTDB	as-hotmail
RADB	as-8151
RADB	as-ctbc-customers8
RADB	as-kornetbgp