MMPC Inc.

Any device whose MAC address begins with F4:28:33 has a network interface built by MMPC 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

F4:28:33

Organization

MMPC Inc.

Address

#F313, KAIST-ICC, 193 Munjiro Yuseong-gu Daejeon Daejeon KR 305-732

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.