ZIV

Any device whose MAC address begins with 40:40:28 has a network interface built by ZIV. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

40:40:28

Organization

ZIV

Address

Polígono Parque Tecnológico, 210 ZAMUDIO VIZCAYA ES 48170

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.