F & S Elektronik Systeme GmbH

Any device whose MAC address begins with 00:05:51 has a network interface built by F & S Elektronik Systeme GmbH. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

00:05:51

Organization

F & S Elektronik Systeme GmbH

Address

Untere Waldplaetze 23 Stuttgart DE 70569

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.