Microsoft

Microsoft Corporation
Data as of 2026-08-09
GLEIF verified
LEI
967600DJA1Q8K13MZ845
Registered name
Microsoft
Jurisdiction
BE
Ultimate parent
No parent on file in GLEIF
Cluster stats
Netblocks63,221 · 86,836,480 IPv4 addresses
IPv6 17,068 prefixes (largest 2603:1000::/24)
Registered in United States (2,103) · United Kingdom (708) · Singapore (37) · Germany (31) · Netherlands (21) · Australia (17)
All fragments 64,417 blocks across 47 clusters
Cluster ID217783412
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 24 distinct registrant names across these blocks
full provenance (JSON) → · how attribution works · report an issue

Footprint over time

7 weekly snapshots · JSON
64,286 +1,225 netblocks since 2026-07-05
2026-07-05 peak 64,286 2026-08-09

IP Ranges (63,221)

showing 50 of 63,221 — 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

IPv6 ranges (17,068)

showing the 15 largest allocations
CIDR
2603:1000::/24
2603:1000::/25
2a00:1c68::/29
None
2404:f802::/31
2a01:110::/31
2001:4898::/32
2404:f800::/32
2404:f801::/32
2404:f802::/32
2404:f803::/32
2a01:110::/32
2a01:111::/32
2001:489a:2000::/35
2001:489a:4000::/35

Domains hosted in this network

what's this?
azure.net

Customer-delegated space

how is this classified?
Unclassified 63,540 (100.5%)
Operator infrastructure (named) 746 (1.2%)

Network trust

what's this?
RPKI hygiene: A how networks compare →
99.0% of checked blocks have valid RPKI ROA coverage (1,979 of 2,000, sampled from 64,286)
Possible discrepancies (3)

These blocks are registered to Microsoft Corporation but cryptographically authorized for a different, unrelated network (3 distinct holders) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.

62.132.26.0/23 /23 authorized for AS1136 — KPN B.V.
74.117.19.0/24 /24 authorized for AS1443 — CooperVision, Inc.
94.140.16.0/24 /24 authorized for AS174 — Cogent Communications, LLC

NIC Handles

AB242-AP ABUSE5675-ARIN ACHMEA-NOC-MNT AE131-AP ALL-MNT AM2589-AP AMENET-MNT AS1103-MNT AS12076 AS16509 AS17144 AS1849-MNT +88 more