Who owns MAC prefix 04F021?

04F021 is registered to Compex Systems Pte Ltd in the IEEE MA-L registry.

What devices use 04F021?

Any network device with a MAC address starting 04:F0:21 was manufactured by or for Compex Systems Pte Ltd.

MA-L · OUI prefix

Compex Systems Pte Ltd

Any MAC address starting 04:F0:21 is registered to Compex Systems Pte Ltd in SG.

OUI prefix	04F021
Vendor	Compex Systems Pte Ltd
Registry	MA-L (24-bit, large block)
Country	SG
Example MAC	04:F0:21:00:00:00

What this means

The IEEE assigned the MA-L block 04F021 to Compex Systems Pte Ltd. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 04:F0:21, it is Compex Systems Pte Ltd hardware.

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