Microsoft

Microsoft Corporation
GLEIF verified
LEI
967600DJA1Q8K13MZ845
Registered name
Microsoft
Jurisdiction
BE
Ultimate parent
No parent on file in GLEIF
Cluster stats
Netblocks63,316 · 219,099,369 IPv4 addresses
Registered in United States (1,897) · United Kingdom (957) · South Africa (19) · Singapore (18) · Netherlands (13) · Germany (13)
All fragments 63,424 blocks across 40 clusters
Cluster ID208783147
RegistryAFRINIC
Owner jurisdictionBE
Customersfind customers using this network →
Evidence & provenance ?
Attribution GLEIF legal-entity match
Legal identityLEI 967600DJA1Q8K13MZ845
Shared handles clustered on 100 shared RIR contact/maintainer handles
Registry names 32 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works

Footprint over time

5 weekly snapshots · JSON
63,234 +173 netblocks since 2026-07-05
2026-07-05 peak 63,234 2026-07-19

IP Ranges (63,316)

showing 50 of 63,316 — see all — ⬇ export CSV (free export limited to 500 rows — subscribe for the full export)
CIDR Org name Registry Status Confidence
1.7.247.31/32 Microsoft PEERINGDB ASSIGNED ● high
1.7.247.188/32 Microsoft PEERINGDB ASSIGNED ● high
1.186.0.0/16 Microsoft Corporation BGP ANNOUNCED ● high
2.58.103.0/24 Microsoft Corporation BGP ANNOUNCED ● high
4.144.0.0/17 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.0.0/12 Microsoft Corporation BGP ANNOUNCED ● high
4.144.9.0/26 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.9.64/27 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.10.32/27 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.10.64/26 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.15.72/29 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.32.35/32 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.51.0/24 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.52.0/25 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.55.88/30 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.128.0/17 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.200.166/32 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.201.132/32 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.203.72/31 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.203.73/32 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.203.116/32 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.203.254/31 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.203.255/32 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.144.204.223/32 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.0.0/16 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.0.64/29 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.0.80/28 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.0.106/31 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.0.192/27 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.8.112/28 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.10.168/29 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.12.240/28 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.16.28/30 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.16.48/28 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.16.144/29 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.16.160/28 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.16.192/26 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.18.62/32 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.18.136/30 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.19.42/32 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.19.43/32 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.19.48/30 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.19.52/30 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.19.64/28 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.19.80/31 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.19.82/32 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.20.102/32 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.20.116/30 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.20.120/31 Microsoft Corporation MICROSOFT ANNOUNCED ● high
4.145.21.64/27 Microsoft Corporation MICROSOFT ANNOUNCED ● high

Domains hosted in this network

what's this?
microsoft.com office.com live.com microsoftonline.com skype.com bing.com windows.com cloud.microsoft msn.com windows.net office365.com office.net sharepoint.com azure.com exp-tas.com msedge.net outlook.com msftncsi.com linkedin.com clarity.ms

Customer-delegated space

how is this classified?
Unclassified 62,570 (98.8%)
Operator infrastructure (named) 746 (1.2%)

Network trust

what's this?
RPKI hygiene: B how networks compare →
94.2% of checked blocks have valid RPKI ROA coverage (1,883 of 2,000, sampled from 63,316)
Possible discrepancies (2)

These blocks are registered to Microsoft Corporation but cryptographically authorized for a different, unrelated network (2 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

2a00:2381:2a60::/48 /48 authorized for AS2856 — British Telecommunications Limited
192.102.165.0/24 /24 authorized for AS5501 — Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.

NIC Handles

AA1419-AP AB242-AP ACHMEA-NOC-MNT AE131-AP AE150-AP AE198-AP AE278-AP AFRINIC-HM-MNT AG545-AP ALL-MNT AM2589-AP AMENET-MNT +88 more