Microsoft
Microsoft Corporation
Data as of 2026-08-30
GLEIF verified
LEI
967600DJA1Q8K13MZ845
Registered name
Microsoft
Jurisdiction
Ultimate parent
No parent on file in GLEIF
Cluster stats
| Netblocks | 64,458 · 86,841,857 IPv4 addresses |
| IPv6 | 17,764 prefixes (largest 2603:1000::/24) |
| Registered in | United States (2,316) · United Kingdom (615) · Germany (21) · Brazil (12) · South Africa (10) · Singapore (4) |
| All fragments | 65,756 blocks across 47 clusters |
| Cluster ID | 231656785 |
| Registry | AFRINIC |
| Owner jurisdiction | BE |
| Customers | find customers using this network → |
Evidence & provenance ?
| Attribution | GLEIF legal-entity match |
| Legal identity | LEI 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
10 weekly snapshots · JSON
65,625
+2,564 netblocks since 2026-07-05
2026-07-05
peak 65,625
2026-08-30
IP Ranges (64,458)
showing 50 of 64,458 — 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 | 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 (17,764)
showing the 15 largest allocationsDomains hosted in this network
what's this?Customer-delegated space
how is this classified?
Unclassified
64,877 (100.7%)
Operator infrastructure (named)
748 (1.2%)
Network trust
what's this?
RPKI hygiene: A
how networks compare →
98.5%
of checked blocks have valid RPKI ROA coverage
(1,970 of 2,000, sampled from 65,625)
Possible discrepancies (1)
These blocks are registered to Microsoft Corporation but cryptographically authorized for a different, unrelated network (1 distinct holder) — often M&A history, multi-homing, or outsourced/managed hosting, occasionally worth a closer look.
| 204.152.19.0/24 /24 | authorized for AS6167 — Verizon Business |
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