AMD

Any device whose MAC address begins with 00:0C:87 has a network interface built by AMD. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:0C:87

Organization

AMD

Address

4555 Great America Pkwy Santa Clara CA US 95054

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.