MCS Logic Inc.

Any device whose MAC address begins with 54:15:89 has a network interface built by MCS Logic 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

54:15:89

Organization

MCS Logic Inc.

Address

A-1701, Munjeong-dong, SK V1 GL Metro City, 128, Beobwon-ro, Songpa-gu, seoul seoul KR 05854

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.