Chromlech

Any device whose MAC address begins with B4:DF:3B has a network interface built by Chromlech. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

B4:DF:3B

Organization

Chromlech

Address

19 av. Gabriel Faure THORIGNE FOUILLARD FR 35235

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.