The OUI prefix 54:A9:D4 is registered as an IEEE MA-L block to Minibar Systems at 7340 Westmore Road, Rockville, MD 20850, US — the company's Maryland headquarters. Minibar Systems is a hospitality-equipment manufacturer best known for in-room amenity hardware: minibars, refrigerators, and in-room safes for hotels worldwide. The networked devices behind this OUI belong to the SmartCube product line — automated in-room minibars that detect inventory with infrared sensors and push real-time consumption and billing data to a hotel's Property Management System (PMS). In a typical deployment an in-room console box bridges the minibar to the hotel LAN over WiFi or cable, relaying data to the vendor's S4 network-server software. This is hospitality IoT rather than consumer or carrier networking gear, so a 54:A9:D4 address on a hotel network most likely belongs to a SmartCube minibar or its console, not a general-purpose endpoint. As with all OUI lookups, the prefix identifies the registered organization for a globally-administered MAC; it does not, on its own, prove device function or firmware. No IEEE assignment date exists for this block — IEEE publishes none — and no vendor-specific CVE or public security advisory for the SmartCube was found, though the usual networked-hotel-IoT segmentation and credential-hygiene concerns apply generically.
- IEEE assignment
- 54:A9:D4 → Minibar Systems, 7340 Westmore Road, Rockville, MD 20850, US [Confirmed] — IEEE MA-L (enrichment/registries/oui.csv line 873)
- Registry / block size
- MA-L (24-bit OUI block, ~16.8M addresses) [Confirmed] — IEEE MA-L; cross-corroborated by maclookup.app and oui.is. NOTE: IEEE's public OUI data publishes NO assignment/registration date; the "August 5, 2011" shown by maclookup.app is a third-party database artifact, not an IEEE fact, and is not recorded as a date.
- HQ / country
- 7340 Westmore Road, Rockville, MD 20850, US [Confirmed] — IEEE MA-L registry address
- Company status
- active [Confirmed] — minibarsystems.com
- Found in
- oui.csv only (not present in mam.csv / oui36.csv — confirms full MA-L, not MA-M/MA-S) [Confirmed] — enrichment/registries
- Device types
- networked in-room minibars and refrigerators (SmartCube line) for hotels; infrared inventory sensing; in-room console box bridges to hotel network [Confirmed] — smartcube.minibarsystems.com, travelnhospitalitytech.com, hotel-online.com
- Connectivity
- WiFi (primary) and cable/wired fallback from the SmartCube console box to the hotel LAN, relaying to PMS and S4 network-server software; no Zigbee/Bluetooth/Ethernet chipset specifics publicly documented [Likely] — travelnhospitalitytech.com
- Industry
- hospitality / hotel in-room amenity equipment; vendor claims 2,000,000+ units installed worldwide [Confirmed] — minibarsystems.com, hospitalitydesignmarketplace.com
- Website
- https://minibarsystems.com/ [Confirmed] — minibarsystems.com
- Security note
- no public CVE or pentest disclosure naming Minibar Systems / SmartCube was found; generic hospitality-IoT risk applies — a networked minibar on the guest-room LAN that is not segmented from the PMS could enable lateral movement; default-credential / firmware / encryption hygiene applies generically [Likely] — hoteltechnologynews.com, switchhotelsolutions.com.au
- Analyst note
- a 54:A9:D4 globally-administered address identifies genuine Minibar Systems hardware (most likely a SmartCube minibar/console); OUI alone does not confirm device role or firmware.