HAKKO Corporation

Any device whose MAC address begins with DC:28:34 has a network interface built by HAKKO Corporation. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

DC:28:34

Organization

HAKKO Corporation

Address

4-5, Shiokusa 2-chome, Naniwaku Osaka Osaka JP 556-0024

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.