Stuart Manufacturing, Inc.

Any device whose MAC address begins with E4:57:A8 has a network interface built by Stuart Manufacturing, 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

E4:57:A8

Organization

Stuart Manufacturing, Inc.

Address

1615 East Wallace Street Fort Wayne Indiana US 46803

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.