HES-SO

Any device whose MAC address begins with E4:AF:A1 has a network interface built by HES-SO. 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:AF:A1

Organization

HES-SO

Address

Case postale 2134 Sion CH 1950

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.