IEIT SYSTEMS Co., Ltd. — 3 prefixes (MA-L)
Summary
- // what this is
- IEIT Systems is registered to MAC prefix
B4:05:5Dand 2 more in the IEEE OUI database. When a device's MAC address begins withB4:05:5D, that block was registered by IEIT Systems — the OUI identifies the maker of the network hardware, which is not always the brand on the device. - // analyst note
- No vendor-specific CVE found; general BMC/IPMI exposure risk applies as it does across the enterprise server class, and the Inspur corporate lineage has a documented historic BMC vulnerability (CVE-2019-2121). Not unique to these OUI blocks.
About this vendor.
A MAC address beginning B4:05:5D, 9C:C2:C4, or 6C:92:BF belongs to IEIT SYSTEMS Co., Ltd., typically seen on enterprise rack servers and storage hardware rather than consumer devices.
IEIT Systems is the current corporate name behind three MA-L blocks IEEE's registry lists for this registrant, all registered from Jinan, Shandong, China. The company is the renamed successor to Inspur Electronic Information Industry Co., Ltd., the server and storage division of the Inspur Group, a publicly traded firm on the Shenzhen Stock Exchange (SZ: 000977).
Confirmed products tie the OUI to real hardware: the NF5280 rack-server family spans multiple generations (M6, M7, R6, A6/A8 with AMD EPYC, and G7 with Intel Xeon Scalable), and independent listings in the Red Hat hardware catalog and VMware VMmark results corroborate specific NF5280 SKUs as certified, shipping enterprise servers.
Two of the three OUI blocks (9C:C2:C4 and 6C:92:BF) share an identical current business address, while the third (B4:05:5D) carries an older registered address — both consistent with an established, ongoing manufacturer rather than a one-off filing.
No IEIT-specific CVE was identified. Enterprise servers of this class commonly expose BMC/IPMI management interfaces, and the Inspur corporate lineage has a documented historic BMC vulnerability (CVE-2019-2121, ASPEED AHB bridge arbitrary read/write); this reflects standard enterprise-server-class risk, not something unique to this vendor's OUI blocks.
- IEEE assignment
- 3 prefixes → IEIT SYSTEMS Co., Ltd., registered Jinan, Shandong, China [Confirmed] — IEEE MA-L
- Registry / block size
- MA-L (24-bit OUI); 3 confirmed prefixes (B4:05:5D, 9C:C2:C4, 6C:92:BF) [Confirmed] — the IEEE MA-L registry (IEEE-sourced cached mirror)
- HQ / country
- Jinan, Shandong, China — two registered addresses on file: No 224 Shanda Road (B4:05:5D) and East side of Floor 9, No.801 Caoshanling South Road, High-tech Zone (9C:C2:C4, 6C:92:BF) [Confirmed] — IEEE MA-L
- Company status
- active; publicly traded as Inspur Electronic Information Industry Co., Ltd. (SZ: 000977), rebranded IEIT Systems [Confirmed] — investing.com, bloomberg.com
- Device types
- enterprise servers, storage systems, cloud data-center hardware [Confirmed] — en.ieisystem.com
- Notable products
- NF5280 rack-server series (M6/M7/R6/A6/A8/G7 generations), corroborated by Red Hat hardware catalog and VMware VMmark listings [Confirmed] — catalog.redhat.com, vmware.com
- Verified prefixes (all MA-L, IEIT SYSTEMS Co., Ltd.)
- B4:05:5D, 9C:C2:C4, 6C:92:BF [Confirmed] — IEEE MA-L
- Registration date
- Unknown — IEEE does not publish OUI assignment/registration dates; no third-party date recorded or asserted [Confirmed] — IEEE the IEEE MA-L registry column set
- Corporate lineage
- formerly Inspur Electronic Information Industry Co., Ltd., server/storage division of Inspur Group [Confirmed] — en.wikipedia.org/wiki/Inspur
- Security context
- no IEIT-specific CVE found; general BMC/IPMI risk shared across enterprise server vendors, including a historic Inspur-lineage BMC vulnerability (CVE-2019-2121) [Likely] — inspursystems.com security bulletin, thehackernews.com
- Analyst note
- multiple OUI assignments plus a traceable public company plus independently corroborated product lines indicate a substantive vendor, not a shell registration.