ControlThings Oy Ab

Any device whose MAC address begins with B4:DD:15 has a network interface built by ControlThings Oy Ab. 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:DD:15

Organization

ControlThings Oy Ab

Address

Werner Söderströmin katu 24 Porvoo Finland FI 06100

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.