ASN AS3598 is an Autonomous System Number used to identify a network for BGP internet routing.

Who manages ASN AS3598?

AS3598 is listed under Microsoft Corporation.

What do peers, upstreams, and downstreams mean in ASN data?

Peers are lateral network interconnections, upstreams are transit providers, and downstreams are customer networks receiving connectivity.

What are routes and IP ranges for an ASN?

Routes and IP ranges are the network prefixes announced by the ASN on the internet and show the address space it originates.

Why is WHOIS data shown for an ASN?

WHOIS data provides registration and contact context for ASN ownership, administration, and operational reference.

How can I access the full ASN tables?

The page shows a preview of large ASN datasets. Use the page controls to load more rows, and upgrade to a paid plan for complete access.

AS3598 Microsoft Corporation | IPGeolocation.io

ASN Lookup Tool

Microsoft Corporation microsoft.com

US 26 Routes

AS Data

AS3598

AS3598 – Microsoft Corporation

AS Number	3598
AS Name	MICROSOFT-CORP-AS
Organization	Microsoft Corporation(msft)
Country	US
Website	microsoft.com
Number of IPv4 Routes	21
Number of IPv6 Routes	5
ASN type	BUSINESS
Registry	ARIN
Date Allocated	1994-05-18

ASN Intelligence API for production workflows

Use ASN data for AS3598 in automation: routing intelligence, peering analysis, ownership checks, and network observability.

Access complete peers, upstreams, downstreams, routes, WHOIS, and contact intelligence via our API. Learn more

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IP Ranges

Route	Origin	Origin Name	ISP	# IPs
131.107.0.0/16	AS3598	Microsoft Corporation	Microsoft Corporation	65536
167.220.204.0/22	AS3598	Microsoft Corporation	Microsoft Corporation	1024
157.58.0.0/16	AS3598	Microsoft Corporation	Microsoft Corporation	65536
157.54.0.0/16	AS3598	Microsoft Corporation	Microsoft Corporation	65536
2001:4898::/32	AS3598	Microsoft Corporation	Microsoft Corporation	~79×10²⁷
157.58.31.0/24	AS3598	Microsoft Corporation	Microsoft Corporation	256
167.220.152.0/24	AS3598	Microsoft Corporation	Microsoft Corporation	256
194.69.96.0/19	AS3598	Microsoft Corporation	Microsoft Limited	8192
167.220.0.0/17	AS3598	Microsoft Corporation	Microsoft Corporation	32768
167.220.208.0/23	AS3598	Microsoft Corporation	Microsoft Corporation	512

Raw Whois Response

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#


ASNumber:       3598
ASName:         MICROSOFT-CORP-AS
ASHandle:       AS3598
RegDate:        1994-05-18
Updated:        2013-08-20    
Ref:            https://rdap.arin.net/registry/autnum/3598



OrgName:        Microsoft Corporation
OrgId:          MSFT
Address:        One Microsoft Way
City:           Redmond
StateProv:      WA
PostalCode:     98052
Country:        US
RegDate:        1998-07-10
Updated:        2025-06-10
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:        
Comment:        For SPAM and other abuse issues, such as Microsoft Accounts, please contact:
Comment:        * abuse@microsoft.com.  
Comment:        
Comment:        To report security vulnerabilities in Microsoft products and services, please contact:
Comment:        * secure@microsoft.com.  
Comment:        
Comment:        For legal and law enforcement-related requests, please contact:
Comment:        * msndcc@microsoft.com
Comment:        
Comment:        For routing, peering or DNS issues, please 
Comment:        contact:
Comment:        * IOC@microsoft.com
Ref:            https://rdap.arin.net/registry/entity/MSFT


OrgTechHandle: MRPD-ARIN
OrgTechName:   Microsoft Routing, Peering, and DNS
OrgTechPhone:  +1-425-882-8080 
OrgTechEmail:  IOC@microsoft.com
OrgTechRef:    https://rdap.arin.net/registry/entity/MRPD-ARIN

OrgAbuseHandle: MAC74-ARIN
OrgAbuseName:   Microsoft Abuse Contact
OrgAbusePhone:  +1-425-882-8080 
OrgAbuseEmail:  abuse@microsoft.com
OrgAbuseRef:    https://rdap.arin.net/registry/entity/MAC74-ARIN

OrgRoutingHandle: CHATU3-ARIN
OrgRoutingName:   Chaturmohta, Somesh 
OrgRoutingPhone:  +1-425-882-8080 
OrgRoutingEmail:  someshch@microsoft.com
OrgRoutingRef:    https://rdap.arin.net/registry/entity/CHATU3-ARIN

OrgTechHandle: SINGH683-ARIN
OrgTechName:   Singh, Prachi 
OrgTechPhone:  +1-425-707-5601 
OrgTechEmail:  pracsin@microsoft.com
OrgTechRef:    https://rdap.arin.net/registry/entity/SINGH683-ARIN

OrgTechHandle: BEDAR6-ARIN
OrgTechName:   Bedard, Dawn 
OrgTechPhone:  +1-425-538-6637 
OrgTechEmail:  dabedard@microsoft.com
OrgTechRef:    https://rdap.arin.net/registry/entity/BEDAR6-ARIN

OrgTechHandle: IPHOS5-ARIN
OrgTechName:   IPHostmaster, IPHostmaster 
OrgTechPhone:  +1-425-538-6637 
OrgTechEmail:  iphostmaster@microsoft.com
OrgTechRef:    https://rdap.arin.net/registry/entity/IPHOS5-ARIN


#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2026, American Registry for Internet Numbers, Ltd.
#

Parsed Whois Response

Peers

AS Number	Description	Country
AS2686	AT&T Enterprises, LLC	US
AS1680	Cellcom Fixed Line Communication L.P	IL
AS12849	Hot Net internet services Ltd.	IL
AS8075	Microsoft Corporation	US
AS12849	Hot-Net internet services Ltd.	IL
AS3549	Level 3 Communications, Inc. (GBLX)	US
AS3356	Level 3 Parent, LLC	US

Upstreams

AS Number	Description	Country
AS2686	AT&T Enterprises, LLC	US
AS1680	Cellcom Fixed Line Communication L.P	IL
AS12849	Hot Net internet services Ltd.	IL
AS8075	Microsoft Corporation	US
AS3356	Level 3 Parent, LLC	US