TOKYO DENSHI SEKEI CO.

Any device whose MAC address begins with 00:C0:A1 has a network interface built by TOKYO DENSHI SEKEI CO.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:C0:A1

Organization

TOKYO DENSHI SEKEI CO.

Address

255-1 RENKOJI, TAMA-SHI JAPAN JP 206

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.