NCSE

Any device whose MAC address begins with 24:5C:BF has a network interface built by NCSE. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

24:5C:BF

Organization

NCSE

Address

Future of China Electronics Science & Technology Beijing Changping District CN 102200

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.