BQ

Any device whose MAC address begins with 4C:74:03 has a network interface built by BQ. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

4C:74:03

Organization

BQ

Address

c Sofía 10. Polígono Európolis Las Rozas de Madrid Madrid ES 28230

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.