SANSHIN ELECTRONICS CO.,LTD.

Any device whose MAC address begins with 4C:40:88 has a network interface built by SANSHIN ELECTRONICS CO.,LTD.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

4C:40:88

Organization

SANSHIN ELECTRONICS CO.,LTD.

Address

4-4-12, Shiba, Minato-ku, Tokyo JP 108-8404

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.