GENERAL MICRO SYSTEMS, INC.
Any device whose MAC address begins with 00:40:0C has a network interface built by GENERAL MICRO SYSTEMS, INC.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.
- OUI prefix
- 00:40:0C
- Organization
- GENERAL MICRO SYSTEMS, INC.
- Address
- P.O. BOX 3689 RANCHO CUCAMONGA CA US 91729
- Source
- IEEE OUI registry
Have a full MAC address? Look it up— we'll also tell you if it's a randomized (private) address rather than a real manufacturer prefix.
Assignment history (1)
The IEEE registry publishes current state only — this is the change record we've kept since we started tracking it daily.
- 2026-07-17Assigned to "GENERAL MICRO SYSTEMS, INC."