i Controls, Inc.

Any device whose MAC address begins with 00:00:3B has a network interface built by i Controls, 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

00:00:3B

Organization

i Controls, Inc.

Address

12F Doonsan building, 105-7 KOREA KR 135-714

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.