Rail-Mil Sp. z o.o. Sp. K.

Any device whose MAC address begins with BC:A3:7F has a network interface built by Rail-Mil Sp. z o.o. Sp. K.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

BC:A3:7F

Organization

Rail-Mil Sp. z o.o. Sp. K.

Address

Kosmatki 82 Warsaw PL 03-982

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.