Emerson Process Management Power & Water Solutions, Inc.

Any device whose MAC address begins with 00:40:03 has a network interface built by Emerson Process Management Power & Water Solutions, 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

00:40:03

Organization

Emerson Process Management Power & Water Solutions, Inc.

Address

200 Beta Drive PITTSBURGH PA US 15238

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.