Hottinger Brüel & Kjær A/S

Any device whose MAC address begins with 00:80:DA has a network interface built by Hottinger Brüel & Kjær 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

00:80:DA

Organization

Hottinger Brüel & Kjær A/S

Address

Teknikerbyen 28 Virum DK DK-2830

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.