MICROSOFT CORPORATION

Microsoft Corporation
GLEIF verified
LEI
INR2EJN1ERAN0W5ZP974
Registered name
MICROSOFT CORPORATION
Jurisdiction
US-WA
Ultimate parent
No parent on file in GLEIF
Cluster stats
Netblocks63,233
All fragments 63,332 blocks across 35 clusters
Cluster ID204396745
RegistryAFRINIC
Owner jurisdictionUS-WA
Customersfind customers using this network →
Evidence & provenance ?
Attribution GLEIF legal-entity match
Legal identityLEI INR2EJN1ERAN0W5ZP974
Shared handles clustered on 100 shared RIR contact/maintainer handles
Registry names 39 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works

Footprint over time

4 weekly snapshots · JSON
63,233 +172 netblocks since 2026-07-05
2026-07-05 peak 63,233 2026-07-13

IP Ranges (63,233)

showing 50 of 63,233 — 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
4.144.0.0/12 Microsoft Corporation BGP ANNOUNCED ● high
4.144.0.0/17 Microsoft Corporation MICROSOFT 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

Corporate group (8 confirmed entities)

+7 additional unconfirmed candidates not shown — full list (JSON)

Network trust

what's this?
RPKI hygiene: A how networks compare →
95.7% of checked blocks have valid RPKI ROA coverage (1,914 of 2,000, sampled from 63,233)
Possible discrepancies (8)

These blocks are registered to Microsoft Corporation but cryptographically authorized for a different, unrelated network (4 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

2a14:c380:e00::/40 /40 authorized for AS197959 — VIRTUA SYSTEMS SAS
2a00:2381:2a60::/48 /48 authorized for AS2856 — British Telecommunications Limited
194.147.71.0/24 /24 authorized for AS21641 — VIRTUASYS America, Inc.
198.252.211.0/24 /24 authorized for AS1798 — State of Oregon
199.231.70.0/24 /24 authorized for AS21641 — VIRTUASYS America, Inc.
206.206.103.0/24 /24 authorized for AS21641 — VIRTUASYS America, Inc.
216.75.145.0/24 /24 authorized for AS21641 — VIRTUASYS America, Inc.
157.254.140.0/24 /24 authorized for AS197959 — VIRTUA SYSTEMS SAS

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