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	Prefix	Description
	66.151.66.0/24	Nuance Communications, Inc.
	67.208.167.0/24	Nuance Communications
	74.123.179.0/24	Microsoft Corporation
	192.135.86.0/24	Microsoft Corporation
	2602:fdbb:a::/48	NUANC
	2602:fdbb:b::/48	NUANC
	2602:fdbb:c::/48	NUANC

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Network Policy

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How are upstreams and downstreams calculated?

Upstreams

	ASN	Description	IPv4	IPv6
	AS46887	Crown Castle Fiber LLC	✔	✔
	AS13791	Unitas Global	✔	✘

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Peers

	ASN	Description	IPv4	IPv6
	AS46887	Crown Castle Fiber LLC	✔	✔
	AS13791	Unitas Global	✔	✘

ASHandle:       AS17144
OrgID:          MSFT
ASName:         NUANCE-NOD
ASNumber:       17144
RegDate:        2000-07-28
Updated:        2024-10-15
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: 2026-02-17T03:25:30Z UTC

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Member of the following AS-SETs

-	Member	ASN Count
RADB	as-ccf	1509
LEVEL3	as-lumen-customers-asns	10695
RADB	as-ccf-test	1461
RADB	as-pnaphou	100
ARIN	as-xo-b	58220