J-MEX Inc.

Any device whose MAC address begins with 7C:0A:50 has a network interface built by J-MEX Inc.. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

7C:0A:50

Organization

J-MEX Inc.

Address

B2, 3F, No.1, Li-Hsin 1st Road, Hsinchu Taiwan TW 300

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.