YAZAKI Energy System Corporation

Any device whose MAC address begins with F8:9F:B8 has a network interface built by YAZAKI Energy System Corporation. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

F8:9F:B8

Organization

YAZAKI Energy System Corporation

Address

1-7-1 YOKOI Shimada -shi,Shizuoka JP 427-8555

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.