Motion Control Systems, Inc.

Any device whose MAC address begins with 00:12:31 has a network interface built by Motion Control Systems, Inc.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:12:31

Organization

Motion Control Systems, Inc.

Address

PO Box 115 New River VA US 24129

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.