Emerson Energy Systems AB

Any device whose MAC address begins with 00:03:AD has a network interface built by Emerson Energy Systems AB. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:03:AD

Organization

Emerson Energy Systems AB

Address

PO Box 92113 SE

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.