CIESSE

Any device whose MAC address begins with 74:B4:72 has a network interface built by CIESSE. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

74:B4:72

Organization

CIESSE

Address

Via G. di Vittorio, 66 Rignano Sull'Arno Florence IT 50067

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.