KATRON COMPUTERS INC.

Any device whose MAC address begins with 00:40:F6 has a network interface built by KATRON COMPUTERS INC.. 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:F6

Organization

KATRON COMPUTERS INC.

Address

4 FL. NO. 2, ALLEY 23 TAIPEI TAIPEI TW TAIWAN

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.