Compex Systems Pte Ltd

Any device whose MAC address begins with 04:F0:21 has a network interface built by Compex Systems Pte Ltd. This prefix (the OUI, or Organizationally Unique Identifier) is assigned by the IEEE and is the first three octets of the address.

OUI prefix

04:F0:21

Organization

Compex Systems Pte Ltd

Address

135 Joo Seng Road, SG 368363

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.