DRS Test and Energy Management or DRS-TEM

Any device whose MAC address begins with 00:05:99 has a network interface built by DRS Test and Energy Management or DRS-TEM. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:05:99

Organization

DRS Test and Energy Management or DRS-TEM

Address

110 Wynn Drive Huntsville AL US 35805

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.