Gehirn Inc.

Any device whose MAC address begins with 5C:3B:35 has a network interface built by Gehirn 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

5C:3B:35

Organization

Gehirn Inc.

Address

1-3-6 Kudan-kita Chiyoda Tokyo JP 102-0073

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.