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AS3598
MICROSOFT-CORP-AS - Microsoft Corporation Announcing routesAS nameMICROSOFT-CORP-AS
OrganisationMicrosoft Corporation
Registry (RIR)ARIN
HandleAS3598
RangeAS3598
Registered18 May 1994
Last changed21 Aug 2013
Abuse contact[email protected]
18IPv4 prefixes
5IPv6 prefixes
5Upstreams
0Downstreams
Upstreams
| AS | Network name | Visibility |
|---|---|---|
| AS2686 | ATGS-MMD-AS - AT&T Enterprises, LLC | 214 |
| AS1680 | NV-ASN - Cellcom Fixed Line Communication L.P | 193 |
| AS8075 | MICROSOFT-CORP-MSN-AS-BLOCK - Microsoft Corporation | 175 |
| AS3356 | LEVEL3 - Level 3 Parent, LLC | 143 |
| AS12849 | HOTNET-IL Hot-Net internet services Ltd. | 1 |
Downstreams
None seen.
IPv4 prefixes (18)
RPKI-validate all prefixes of AS3598
Contacts
| Role | Name | Handle | Email / phone | Address |
|---|---|---|---|---|
| registrant | Microsoft Corporation | MSFT | One Microsoft Way, Redmond, WA, 98052, United States | |
| technical | Microsoft Routing, Peering, and DNS | MRPD-ARIN | [email protected], +1-425-882-8080 | One Microsoft Way, Redmond, WA, 98052, United States |
| technical | Prachi Singh | SINGH683-ARIN | [email protected], +1-425-707-5601 | 1 Microsoft Way, Redmond, WA, 98052, United States |
| administrative, technical | IPHostmaster IPHostmaster | IPHOS5-ARIN | [email protected], +1-425-538-6637 | One Microsoft Way, Redmond, WA, 20147, United States |
| technical | Dawn Bedard | BEDAR6-ARIN | [email protected], +1-425-538-6637 | 1 Redmond Way, Redmond, WA, 98052, United States |
| abuse | Microsoft Abuse Contact | MAC74-ARIN | [email protected], +1-425-882-8080 | One Microsoft Way, Redmond, WA, 98052, United States |
| routing | Somesh Chaturmohta | CHATU3-ARIN | [email protected], +1-425-882-8080 | One Microsoft way, Redmond, WA, 98052, United States |
Raw registry response
{
"endAutnum": 3598,
"entities": [
{
"entities": [
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-10-16T14:01:14-04:00"
},
{
"eventAction": "registration",
"eventDate": "2013-08-20T19:26:59-04:00"
}
],
"handle": "MRPD-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/MRPD-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/3598"
},
{
"href": "https://whois.arin.net/rest/poc/MRPD-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/3598"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"To report suspected security issues specific to \r",
"traffic emanating from Microsoft online services, \r",
"including the distribution of malicious content \r",
"or other illicit or illegal material through a \r",
"Microsoft online service, please submit reports \r",
"to:\r",
"* https://cert.microsoft.com. \r",
"\r",
"For SPAM and other abuse issues, such as Microsoft \r",
"Accounts, please contact:\r",
"* [email protected]. \r",
"\r",
"To report security vulnerabilities in Microsoft \r",
"products and services, please contact:\r",
"* [email protected]. \r",
"\r",
"For legal and law enforcement-related requests, \r",
"please contact:\r",
"* [email protected]\r",
"\r",
"For routing, peering or DNS issues, please \r",
"contact:\r",
"* [email protected]"
],
"title": "Registration Comments"
}
],
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "One Microsoft Way\nRedmond\nWA\n98052\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Microsoft Routing, Peering, and DNS"
],
[
"org",
[],
"text",
"Microsoft Corporation"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-425-882-8080"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2023-07-11T19:59:19-04:00"
},
{
"eventAction": "registration",
"eventDate": "2023-06-13T16:28:52-04:00"
}
],
"handle": "SINGH683-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/SINGH683-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/3598"
},
{
"href": "https://whois.arin.net/rest/poc/SINGH683-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/3598"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"ARIN has attempted to validate the data for this POC, but has received no response from the POC since 2024-07-10"
],
"title": "Unvalidated POC"
}
],
"roles": [
"technical"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "1 Microsoft Way\nRedmond\nWA\n98052\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Prachi Singh"
],
[
"n",
[],
"text",
[
"Singh",
"Prachi",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-425-707-5601"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-10-21T16:47:32-04:00"
},
{
"eventAction": "registration",
"eventDate": "2021-10-13T17:30:13-04:00"
}
],
"handle": "IPHOS5-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/IPHOS5-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/3598"
},
{
"href": "https://whois.arin.net/rest/poc/IPHOS5-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/3598"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"administrative",
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "One Microsoft Way\nRedmond\nWA\n20147\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"IPHostmaster IPHostmaster"
],
[
"n",
[],
"text",
[
"IPHostmaster",
"IPHostmaster",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-425-538-6637"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-08-19T10:44:04-04:00"
},
{
"eventAction": "registration",
"eventDate": "2016-10-20T15:51:33-04:00"
}
],
"handle": "BEDAR6-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/BEDAR6-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/3598"
},
{
"href": "https://whois.arin.net/rest/poc/BEDAR6-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/3598"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"technical"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "1 Redmond Way\nRedmond\nWA\n98052\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Dawn Bedard"
],
[
"n",
[],
"text",
[
"Bedard",
"Dawn",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-425-538-6637"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-06-10T13:18:57-04:00"
},
{
"eventAction": "registration",
"eventDate": "2013-08-20T19:24:57-04:00"
}
],
"handle": "MAC74-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/MAC74-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/3598"
},
{
"href": "https://whois.arin.net/rest/poc/MAC74-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/3598"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"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 https://cert.microsoft.com. \r",
"For SPAM and other abuse issues, such as Microsoft Accounts, please contact [email protected]. \r",
"To report security vulnerabilities in Microsoft products and services, please contact [email protected]. \r",
"For legal and law enforcement-related requests, please contact [email protected]\r",
"For routing, peering or DNS issues, please contact [email protected]"
],
"title": "Registration Comments"
}
],
"roles": [
"abuse"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "One Microsoft Way\nRedmond\nWA\n98052\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Microsoft Abuse Contact"
],
[
"org",
[],
"text",
"Microsoft Corporation"
],
[
"kind",
[],
"text",
"group"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-425-882-8080"
]
]
]
},
{
"events": [
{
"eventAction": "last changed",
"eventDate": "2026-04-10T19:08:09-04:00"
},
{
"eventAction": "registration",
"eventDate": "2023-06-13T16:26:16-04:00"
}
],
"handle": "CHATU3-ARIN",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/CHATU3-ARIN",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/3598"
},
{
"href": "https://whois.arin.net/rest/poc/CHATU3-ARIN",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/3598"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"roles": [
"routing"
],
"status": [
"validated"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"adr",
{
"label": "One Microsoft way\nRedmond\nWA\n98052\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"fn",
[],
"text",
"Somesh Chaturmohta"
],
[
"n",
[],
"text",
[
"Chaturmohta",
"Somesh",
"",
"",
""
]
],
[
"kind",
[],
"text",
"individual"
],
[
"email",
[],
"text",
"[email protected]"
],
[
"tel",
{
"type": [
"work",
"voice"
]
},
"text",
"+1-425-882-8080"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2025-06-10T13:41:34-04:00"
},
{
"eventAction": "registration",
"eventDate": "1998-07-10T00:00:00-04:00"
}
],
"handle": "MSFT",
"links": [
{
"href": "https://rdap.arin.net/registry/entity/MSFT",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/3598"
},
{
"href": "https://whois.arin.net/rest/org/MSFT",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/3598"
}
],
"objectClassName": "entity",
"port43": "whois.arin.net",
"remarks": [
{
"description": [
"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:\r",
"* https://cert.microsoft.com. \r",
"\r",
"For SPAM and other abuse issues, such as Microsoft Accounts, please contact:\r",
"* [email protected]. \r",
"\r",
"To report security vulnerabilities in Microsoft products and services, please contact:\r",
"* [email protected]. \r",
"\r",
"For legal and law enforcement-related requests, please contact:\r",
"* [email protected]\r",
"\r",
"For routing, peering or DNS issues, please \r",
"contact:\r",
"* [email protected]"
],
"title": "Registration Comments"
}
],
"roles": [
"registrant"
],
"vcardArray": [
"vcard",
[
[
"version",
[],
"text",
"4.0"
],
[
"fn",
[],
"text",
"Microsoft Corporation"
],
[
"adr",
{
"label": "One Microsoft Way\nRedmond\nWA\n98052\nUnited States"
},
"text",
[
"",
"",
"",
"",
"",
"",
""
]
],
[
"kind",
[],
"text",
"org"
]
]
]
}
],
"events": [
{
"eventAction": "last changed",
"eventDate": "2013-08-20T21:03:07-04:00"
},
{
"eventAction": "registration",
"eventDate": "1994-05-18T00:00:00-04:00"
}
],
"handle": "AS3598",
"links": [
{
"href": "https://rdap.arin.net/registry/autnum/3598",
"rel": "self",
"type": "application/rdap+json",
"value": "https://rdap.arin.net/registry/autnum/3598"
},
{
"href": "https://whois.arin.net/rest/asn/AS3598",
"rel": "alternate",
"type": "application/xml",
"value": "https://rdap.arin.net/registry/autnum/3598"
}
],
"name": "MICROSOFT-CORP-AS",
"notices": [
{
"description": [
"By using the ARIN RDAP/Whois service, you are agreeing to the RDAP/Whois Terms of Use"
],
"links": [
{
"href": "https://www.arin.net/resources/registry/whois/tou/",
"rel": "terms-of-service",
"type": "text/html",
"value": "https://rdap.arin.net/registry/autnum/3598"
}
],
"title": "Terms of Service"
},
{
"description": [
"If you see inaccuracies in the results, please visit: "
],
"links": [
{
"href": "https://www.arin.net/resources/registry/whois/inaccuracy_reporting/",
"rel": "inaccuracy-report",
"type": "text/html",
"value": "https://rdap.arin.net/registry/autnum/3598"
}
],
"title": "Whois Inaccuracy Reporting"
},
{
"description": [
"Copyright 1997-2026, American Registry for Internet Numbers, Ltd."
],
"title": "Copyright Notice"
}
],
"objectClassName": "autnum",
"port43": "whois.arin.net",
"rdapConformance": [
"nro_rdap_profile_0",
"rdap_level_0",
"nro_rdap_profile_asn_flat_0"
],
"startAutnum": 3598,
"status": [
"active"
]
}Results come from public internet registries and live global routing data. Results are cached for up to an hour. Lookups are logged with your IP address to prevent abuse — see our Privacy Policy.