Beyless

Any device whose MAC address begins with 9C:90:19 has a network interface built by Beyless. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

9C:90:19

Organization

Beyless

Address

#725,42,Changeop-ro, Sujeong-gu Seongnam-si Gyeonggi-do KR 13449

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.