Aviwest

Any device whose MAC address begins with B4:31:B8 has a network interface built by Aviwest. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

B4:31:B8

Organization

Aviwest

Address

6 rue du Patis Tatelin Rennes FR 35700

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.