Yamato Denki Co.,Ltd.

Any device whose MAC address begins with A4:DA:D4 has a network interface built by Yamato 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

A4:DA:D4

Organization

Yamato Denki Co.,Ltd.

Address

3-2-14,Koyama Shinagawa-ku,Tokyo JP 142-0062

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.