CAMEO COMMUNICATIONS, INC.

Any device whose MAC address begins with 00:40:F4 has a network interface built by CAMEO COMMUNICATIONS, 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:F4

Organization

CAMEO COMMUNICATIONS, INC.

Address

71 SPITBROOK ROAD, STE #410 NASHUA NH US 030603

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.