Supermicro holds 7 MA-L blocks (about 117.4 million addresses total) registered as "Super Micro Computer, Inc." at 980 Rock Ave, San Jose, California. Verified samples include 00:25:90, 00:30:48, 0C:C4:7A, 3C:EC:EF, 7C:C2:55, and AC:1F:6B. These OUIs appear on server motherboards, rackmount servers, GPU/AI servers, storage systems, blade/Twin/edge servers, and workstation boards — all of which carry BMC/IPMI management ports plus onboard NICs. Supermicro is a major US server and datacenter vendor. The key analyst point is that a Supermicro OUI in datacenter ARP or switch tables almost always identifies a server, frequently the BMC/IPMI management port (out-of-band) or an onboard data-plane NIC — and seeing both a Supermicro management MAC and a separate NIC-vendor MAC on the same host is normal. For triage, with 7 blocks this is a high-frequency datacenter signal; distinguish the management-plane (IPMI) MAC from the data-plane NIC MAC when inventorying.
- IEEE assignment
- 7 prefixes → "Super Micro Computer, Inc.", registered San Jose, CA [Confirmed] — IEEE MA-L
- Registry / block size
- MA-L; 7 blocks (~117.4M addresses) [Confirmed] — maclookup.app (IEEE-sourced)
- HQ / country
- 980 Rock Ave, San Jose, CA 95131, US [Confirmed] — maclookup.app
- Company status
- active; major US server/datacenter hardware vendor [Confirmed] — supermicro.com
- Device types
- server motherboards, rackmount servers, GPU/AI servers, storage systems, blade/Twin/edge servers, workstation boards (BMC/IPMI ports + onboard NICs) [Confirmed] — maclookup.app
- Notable products
- X-series server boards, rackmount/GPU/AI servers, Twin/Blade/edge systems
- Verified prefix sample
- 00:25:90, 00:30:48, 0C:C4:7A, 3C:EC:EF, 7C:C2:55, AC:1F:6B [Confirmed] — maclookup.app
- Special note
- Distinguish management-plane (IPMI/BMC) MACs from data-plane NIC MACs when inventorying — both commonly appear per host. The IEEE registry publishes no assignment dates, so none is stated here. [Confirmed]
- Related vendors
- Dell/HPE (server competitors); ODM-direct supplier
- Analyst note
- A Supermicro OUI in datacenter ARP/switch tables almost always identifies a server — frequently the BMC/IPMI management port or an onboard NIC; seeing both a Supermicro management MAC and a separate NIC-vendor MAC on the same host is normal. With 7 blocks, a high-frequency datacenter signal.