Toyo Seisakusho Kaisha, Limited

Any device whose MAC address begins with 3C:3B:4D has a network interface built by Toyo Seisakusho Kaisha, Limited. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

3C:3B:4D

Organization

Toyo Seisakusho Kaisha, Limited

Address

2-4-6 Honjyo Higashi-Osaka Osaka JP 578-0953

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.