JBL Professional

Any device whose MAC address begins with A4:3C:D4 has a network interface built by JBL Professional. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

A4:3C:D4

Organization

JBL Professional

Address

8500 Balboa Boulevard Northridge CA US 91325

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.