MicroBrain,Inc.

Any device whose MAC address begins with 00:40:F0 has a network interface built by MicroBrain,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:F0

Organization

MicroBrain,Inc.

Address

Yuzan Bldg. 4F, Aichi-gun AICHI JP 480-1117

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.