CHANNEL SYSTEMS INTERN'L INC.

Any device whose MAC address begins with 00:40:BF has a network interface built by CHANNEL SYSTEMS INTERN'L 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:BF

Organization

CHANNEL SYSTEMS INTERN'L INC.

Address

93 SO. LA PATERA LANE SANTA BARBARA CA US 93117

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.