FISCHER AND PORTER CO.

Any device whose MAC address begins with 00:40:C3 has a network interface built by FISCHER AND PORTER CO.. 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:C3

Organization

FISCHER AND PORTER CO.

Address

125 E. COUNTY LINE ROAD WARMINSTER PA US 18974

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.