Silicon Laboratories
Any device whose MAC address begins with F4:B3:B1 has a network interface built by Silicon Laboratories. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.
- OUI prefix
- F4:B3:B1
- Organization
- Silicon Laboratories
- Address
- 400 West Cesar Chavez Street Austin TX US 78701
- 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.