Elettronica Santerno SpA

Any device whose MAC address begins with 90:51:3F has a network interface built by Elettronica Santerno SpA. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

90:51:3F

Organization

Elettronica Santerno SpA

Address

Via della Concia 7 Castel Guelfo (BO) IT 40026

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.