EXTENDED SYSTEMS

Any device whose MAC address begins with 00:40:68 has a network interface built by EXTENDED SYSTEMS. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:40:68

Organization

EXTENDED SYSTEMS

Address

6123 NORTH MEEKER AVENUE BOISE ID US 83704

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.