Sirius Electronic Systems Srl

Any device whose MAC address begins with 90:5C:34 has a network interface built by Sirius Electronic Systems Srl. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

90:5C:34

Organization

Sirius Electronic Systems Srl

Address

via Robinie, 33 Gravellona Toce VB IT 28883

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.