DATACOM TECHNOLOGIES

Any device whose MAC address begins with 00:40:0F has a network interface built by DATACOM TECHNOLOGIES. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:40:0F

Organization

DATACOM TECHNOLOGIES

Address

11001 31ST PLACE WEST EVERETT WA US 98204

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.