[ IP ]

4.251.173.1

Microsoft Corporation (MSFT)

#11,661Top IPs · 1M scope0 domains

Overview

Top IPs list rank

1M: #11,661(767 observation hits)

Hosted domains (90 days): 0
Hosted domains (all time): 0
First seen: Mon Aug 24 2026 17:55:33 GM
Last seen
PDNS hits (90 days): 767
Country: US
Snapshot: 1970-01-01

Network operated by Microsoft Corporation (MSFT) (MSFT).

List rank history

30 daily snapshots in the Top IPs list (1M scope). Lower rank numbers indicate more accumulated passive-DNS observation evidence.

Whois — 4.251.173.1

Netname: MSFT
Organization: Microsoft Corporation (MSFT)
Country: US
ASN: —

Registry record

WHOIS

Registry fields

Network range: 4.240.0.0 - 4.255.255.255
CIDR: 4.240.0.0/12
Network name: MSFT
Net Handle: NET-4-240-0-0-2
Parent network: NET4 (NET-4-0-0-0-0)

Hosted domains — PDNS pivot

No hosted domains found for 4.251.173.1 in passive DNS yet.

# # 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. # # # Query terms are ambiguous. The query is assumed to be: # "n 4.251.173.1" # # Use "?" to get help. # NetRange: 4.240.0.0 - 4.255.255.255 CIDR: 4.240.0.0/12 NetName: MSFT NetHandle: NET-4-240-0-0-2 Parent: NET4 (NET-4-0-0-0-0) NetType: Direct Allocation OriginAS: Organization: Microsoft Corporation (MSFT) RegDate: 2021-04-06 Updated: 2021-04-06 Ref: https://rdap.arin.net/registry/ip/4.240.0.0 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: * [email protected]. Comment: Comment: To report security vulnerabilities in Microsoft products and services, please contact: Comment: * [email protected]. Comment: Comment: For legal and law enforcement-related requests, please contact: Comment: * [email protected] Comment: Comment: For routing, peering or DNS issues, please Comment: contact: Comment: * [email protected] Ref: https://rdap.arin.net/registry/entity/MSFT OrgTechHandle: MRPD-ARIN OrgTechName: Microsoft Routing, Peering, and DNS OrgTechPhone: +1-425-882-8080 OrgTechEmail: [email protected] OrgTechRef: https://rdap.arin.net/registry/entity/MRPD-ARIN OrgTechHandle: SINGH683-ARIN OrgTechName: Singh, Prachi OrgTechPhone: +1-425-707-5601 OrgTechEmail: [email protected] OrgTechRef: https://rdap.arin.net/registry/entity/SINGH683-ARIN OrgTechHandle: IPHOS5-ARIN OrgTechName: IPHostmaster, IPHostmaster OrgTechPhone: +1-425-538-6637 OrgTechEmail: [email protected] OrgTechRef: https://rdap.arin.net/registry/entity/IPHOS5-ARIN OrgRoutingHandle: CHATU3-ARIN OrgRoutingName: Chaturmohta, Somesh OrgRoutingPhone: +1-425-882-8080 OrgRoutingEmail: [email protected] OrgRoutingRef: https://rdap.arin.net/registry/entity/CHATU3-ARIN OrgAbuseHandle: MAC74-ARIN OrgAbuseName: Microsoft Abuse Contact OrgAbusePhone: +1-425-882-8080 OrgAbuseEmail: [email protected] OrgAbuseRef: https://rdap.arin.net/registry/entity/MAC74-ARIN OrgTechHandle: BEDAR6-ARIN OrgTechName: Bedard, Dawn OrgTechPhone: +1-425-538-6637 OrgTechEmail: [email protected] OrgTechRef: https://rdap.arin.net/registry/entity/BEDAR6-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. #