DY-4 INCORPORATED

Any device whose MAC address begins with 00:80:7F has a network interface built by DY-4 INCORPORATED. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:80:7F

Organization

DY-4 INCORPORATED

Address

333 PALLADIUM DRIVE, MS 312 CA

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.