SHOWA DENKI CO.,LTD.

Any device whose MAC address begins with F0:23:29 has a network interface built by SHOWA DENKI 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

F0:23:29

Organization

SHOWA DENKI CO.,LTD.

Address

1-25 Daito-city Osaka JP 574-0052

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.