TAIYO YUDEN CO., LTD.

Any device whose MAC address begins with D4:4B:5E has a network interface built by TAIYO YUDEN 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

D4:4B:5E

Organization

TAIYO YUDEN CO., LTD.

Address

8-1, Sakae-cho Takasaki-shi Gunma JP 370-8522

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.