Bang & Olufsen A/S

Any device whose MAC address begins with 00:09:A7 has a network interface built by Bang & Olufsen A/S. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:09:A7

Organization

Bang & Olufsen A/S

Address

Peter Bangs Vej 15 Struer DK 7600

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.