3598 MICROSOFT-CORP-AS - Microsoft Corporation, US
Adjacency: 4 Upstream: 4 Downstream: 0
Upstream Adjacent AS list
AS3356 LEVEL3 - Level 3 Parent, LLC, US
AS8075 MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation, US
AS2686 ATGS-MMD-AS - AT&T Enterprises, LLC, US
AS1680 NV-ASN - Cellcom Fixed Line Communication L.P, IL
Rank AS Type Originate Addr Space (pfx) Transit Addr space (pfx) Description 603 AS3598 ORIGIN Originate: 611328 /12.78 Transit: 0 /0.00 MICROSOFT-CORP-AS - Microsoft Corporation, US
Aggregation Suggestions
Filter: Aggregates, Specifics
This report does not take into account conditions local to each origin AS in terms of policy or traffic engineering requirements, so this is an approximate guideline as to aggregation possibilities.
Rank AS AS Name Current Wthdw Aggte Annce Redctn % 5186 AS3598 MICROSOFT-CORP-AS - Microsoft Corporation, US 21 9 0 12 9 42.86% Prefix AS Path Aggregation Suggestion 65.53.0.0/16 4777 2497 3356 3598 131.107.0.0/16 4608 8075 3598 157.54.0.0/16 4777 2497 3356 3598 157.57.0.0/16 4777 2497 3356 3598 157.58.0.0/16 4608 8075 3598 157.58.31.0/24 4608 8075 3598 - Withdrawn - matching aggregate 157.58.0.0/16 4608 8075 3598 157.58.192.0/19 4608 8075 3598 - Withdrawn - matching aggregate 157.58.0.0/16 4608 8075 3598 157.59.0.0/16 4777 2497 3356 3598 157.60.0.0/16 4777 2497 3356 3598 167.220.0.0/16 4608 8075 3598 167.220.0.0/17 4608 8075 3598 - Withdrawn - matching aggregate 167.220.0.0/16 4608 8075 3598 167.220.128.0/18 4608 8075 3598 - Withdrawn - matching aggregate 167.220.0.0/16 4608 8075 3598 167.220.148.0/22 4608 8075 3598 - Withdrawn - matching aggregate 167.220.0.0/16 4608 8075 3598 167.220.152.0/24 4608 8075 3598 - Withdrawn - matching aggregate 167.220.0.0/16 4608 8075 3598 167.220.192.0/19 4608 8075 3598 - Withdrawn - matching aggregate 167.220.0.0/16 4608 8075 3598 167.220.204.0/22 4608 7575 3356 1680 3598 167.220.208.0/23 4608 7575 3356 2686 3598 167.220.224.0/19 4608 8075 3598 - Withdrawn - matching aggregate 167.220.0.0/16 4608 8075 3598 194.69.96.0/19 4608 8075 3598 194.69.100.0/22 4608 8075 3598 - Withdrawn - matching aggregate 194.69.96.0/19 4608 8075 3598 198.105.232.0/22 4608 8075 3598
Advertisements that are fragments of the original RIR allocation (more specifics) originated by this AS.
AS3598 12 More Specifics 21 Total Advertisements MICROSOFT-CORP-AS - Microsoft Corporation, US
65.53.0.0/16 65.52.0.0/14
157.54.0.0/16 157.54.0.0/15
157.57.0.0/16 157.56.0.0/14
157.58.0.0/16 157.56.0.0/14
157.58.31.0/24 157.56.0.0/14
157.58.192.0/19 157.56.0.0/14
157.59.0.0/16 157.56.0.0/14
167.220.148.0/22 167.220.128.0/18
167.220.152.0/24 167.220.128.0/18
167.220.204.0/22 167.220.192.0/19
167.220.208.0/23 167.220.192.0/19
194.69.100.0/22 194.69.96.0/19
whois: 402591
IANA has recorded AS3598 as originally allocated by
/usr/bin/whois -h jwhois.apnic.netr "AS3598\n
#
# 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: BEDAR6-ARIN
OrgTechName: Bedard, Dawn
OrgTechPhone: +1-425-538-6637
OrgTechEmail: dabedard@microsoft.com
OrgTechRef: https://rdap.arin.net/registry/entity/BEDAR6-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: IPHOS5-ARIN
OrgTechName: IPHostmaster, IPHostmaster
OrgTechPhone: +1-425-538-6637
OrgTechEmail: iphostmaster@microsoft.com
OrgTechRef: https://rdap.arin.net/registry/entity/IPHOS5-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
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
#
# 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.
#