D&M Holdings Inc.

Any device whose MAC address begins with 8C:A9:6F has a network interface built by D&M Holdings 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

8C:A9:6F

Organization

D&M Holdings Inc.

Address

D&M Building, 2-1 Nisshin-cho Kawasaki-shi Kanagawa JP 210-8569

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.