FUJITSU LIMITED — 24 prefixes (MA-L), Fujitsu family ~37

Fujitsu's IEEE footprint spans a family of MA-L blocks: the canonical entity "FUJITSU LIMITED" (Kawasaki, Kanagawa, JP) holds 24 MA-L OUI blocks, and the broader Fujitsu family — including subsidiaries such as Fujitsu Technology Solutions GmbH, Fujitsu Client Computing Limited, Fujitsu I-Network Systems Limited, the former Fujitsu Siemens Computers, Fujitsu ISOTEC, Fujitsu Microelectronics, Nanjing Fujitsu, Fujitsu Softek, Fujitsu Services, and Fujitsu Nexion — totals roughly 37 MA-L blocks across the local oui.csv snapshot, plus one MA-M (28-bit) assignment for "Fujitsu component limited" (Tokyo, JP) and zero MA-S/oui36 entries. These prefixes appear in the wild predominantly on enterprise computing hardware: PRIMERGY x86 servers (and their iRMC out-of-band management interfaces), PRIMEQUEST mission-critical servers, CELSIUS workstations, ESPRIMO desktops, LIFEBOOK notebooks, ETERNUS storage, FUTRO thin clients, and Edgiot IoT/M2M gateways. A PRIMERGY server NIC or an iRMC management port is the most common real-world sighting context. Note that IEEE publishes no registration dates for OUI prefixes — third-party lookup sites such as maclookup.app show "registration dates" (e.g. 1998-04-22 for 00:00:0E) that are database artifacts from when IEEE first published or updated the list, not IEEE-sourced assignment facts, and must never be presented as such.

IEEE assignment (canonical entity)

24 MA-L prefixes → FUJITSU LIMITED, registered Kawasaki, Kanagawa, JP [Confirmed] — IEEE MA-L (enrichment/registries/oui.csv); corroborated regauth.standards.ieee.org

Registry / block size

MA-L (24-bit OUI) is the primary registry class; one MA-M (28-bit) entry exists for "Fujitsu component limited"; no MA-S/oui36 entries [Confirmed] — enrichment/registries/oui.csv, mam.csv, oui36.csv

Fujitsu family total

~37 MA-L blocks across all entities with "fujitsu" in the org name in oui.csv [Confirmed] — enrichment/registries/oui.csv (current local snapshot; drifts as IEEE registers more blocks)

HQ / country

403, Kosugi-cho 1-chome, Nakahara-ku, Kawasaki, Kanagawa, JP 211-0063 (most common registry address); newer blocks use Fujitsu Technology Park, 4-1-1 Kamikodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa, JP 211-8588. Country: JP (Japan) [Confirmed] — enrichment/registries/oui.csv; Fujitsu relocated HQ to Kawasaki in 2024 per en.wikipedia.org/wiki/Fujitsu

Company status

active [Confirmed] — fujitsu.com; en.wikipedia.org/wiki/Fujitsu. Japanese multinational ICT equipment/services corporation, founded 20 June 1935; ~124,000 employees, 50+ countries (FY2024 revenue ¥3.76 trillion)

Verified sample prefixes (FUJITSU LIMITED, MA-L)

00:00:0E, 00:0B:5D, 00:17:42, 00:23:26, 2C:D4:44, 34:FE:9E, 60:D5:1B, C4:7D:46, FC:08:4A [Confirmed] — enrichment/registries/oui.csv (both angles agree on these)

Subsidiary prefixes (MA-L, selected)

00:A0:CA (FUJITSU DENSO LTD.), 00:0D:57 (Fujitsu I-Network Systems Limited), 00:30:05 (Fujitsu Siemens Computers), 00:10:55 (FUJITSU MICROELECTRONICS INC.), 00:10:8C (Fujitsu Services Ltd), 00:A0:77 (FUJITSU NEXION INC.), CC:B3:F8 (FUJITSU ISOTEC LIMITED), 08:E5:DA (NANJING FUJITSU COMPUTER PRODUCTS CO. LTD.), E4:46:B0 (Fujitsu Client Computing Limited), 90:1B:0E / 4C:52:62 / 00:19:99 (Fujitsu Technology Solutions GmbH) [Confirmed] — enrichment/registries/oui.csv

MA-M prefix

98:6E:E8:4 (MA-M / 28-bit) → "Fujitsu component limited", Shinagawa-ku, Tokyo, JP 140-8586 [Confirmed] — enrichment/registries/mam.csv

Registration date

Unknown — IEEE publishes NO registration/assignment dates for MAC/OUI prefixes; the oui.csv registry has no date column. Third-party "date registered" values (e.g. maclookup.app's 1998-04-22 for 00:00:0E) are database artifacts, not IEEE facts. Do not invent or use epoch placeholders. [Confirmed null] — enrichment/registries/oui.csv (no date field); maclookup.app/vendors/fujitsu-limited (artifact dates)

Device types

PRIMERGY servers (RX/TX/BX/CX; Tower/Rack/Blade/Scale-out), PRIMEQUEST mission-critical servers, CELSIUS Xeon workstations, ESPRIMO desktops, LIFEBOOK notebooks, STYLISTIC tablets, ETERNUS storage, FUTRO thin clients, ScanSnap / fi-series scanners, BS2000 mainframes, Edgiot GW1500 IoT/M2M gateways, iRMC server management controllers [Confirmed] — en.wikipedia.org/wiki/Fujitsu, /wiki/Primergy, /wiki/Fujitsu_Celsius, /wiki/List_of_Fujitsu_products

Security context

Fujitsu runs a PSIRT (security.ts.fujitsu.com, now branded Fsas Technologies). Notable items: CVE-2024-40617 (CVSS 6.5, CWE-22 path traversal) in Network Edgiot GW1500 (M2M-GW for FENICS) < V02L19C01, authenticated arbitrary file read; AMI MegaRAC SPX / IPMI vulns (Fujitsu PSIRT FJ-ISS-2024-041000, max CVSS 9.1) affecting PRIMERGY, PRIMEQUEST, CELSIUS, ETERNUS, BS2000, iRMC firmware; AMI APTIO V "PKFAIL" UEFI Secure Boot bypass (FJ-ISS-2024-072412) on PRIMERGY; Fujitsu ISM cleartext storage (CISA ICSA-23-255-02). iRMC out-of-band management interfaces should never be exposed to public networks. [Confirmed] — nvd.nist.gov/vuln/detail/CVE-2024-40617, security.ts.fujitsu.com PSIRT notices, cisa.gov/.../icsa-23-255-02

Website

https://www.fujitsu.com/global/ (corporate); https://security.ts.fujitsu.com/ (PSIRT / advisories, Fsas Technologies brand) [Confirmed] — fujitsu.com

Related vendors

Fujitsu Technology Solutions GmbH, Fujitsu Client Computing Limited (PC spin-off, post-Lenovo JV), Fujitsu I-Network Systems Limited, Fujitsu Siemens Computers (former), Fujitsu ISOTEC, Fujitsu Microelectronics, Nanjing Fujitsu, Fujitsu Softek, Fujitsu Services, Fujitsu Nexion [Confirmed] — enrichment/registries/oui.csv

Analyst note

A globally-administered Fujitsu OUI reliably identifies genuine Fujitsu enterprise hardware — most often a PRIMERGY server NIC or an iRMC management interface. Subsidiary blocks (e.g. Fujitsu Technology Solutions, Fujitsu Client Computing) trace to the same corporate family but distinct registrant names, so map them deliberately. iRMC/BMC management ports are high-value infrastructure targets and should be segmented off public networks.