Caldero Limited

Any device whose MAC address begins with B4:D6:4E has a network interface built by Caldero Limited. 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:D6:4E

Organization

Caldero Limited

Address

Concordia Works, 30 Sovereign Street Leeds West Yorkshire GB LS1 4BA

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.