ABB SPA, ABB SACE DIV.

Any device whose MAC address begins with AC:D3:64 has a network interface built by ABB SPA, ABB SACE DIV.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

AC:D3:64

Organization

ABB SPA, ABB SACE DIV.

Address

V.LE DELL'INDUSTRIA, 18 VITTUONE MI IT 20010

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.