Koss Corporation

Any device whose MAC address begins with C0:22:50 has a network interface built by Koss 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

C0:22:50

Organization

Koss Corporation

Address

4129 N. Port Washington Ave. Milwaukee WI US 53212

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.