Who owns MAC prefix 004001?

004001 is registered to Zero One Technology Co. Ltd. in the IEEE MA-L registry.

What devices use 004001?

Any network device with a MAC address starting 00:40:01 was manufactured by or for Zero One Technology Co. Ltd..

MA-L · OUI prefix

Zero One Technology Co. Ltd.

Any MAC address starting 00:40:01 is registered to Zero One Technology Co. Ltd. in TW.

OUI prefix	004001
Vendor	Zero One Technology Co. Ltd.
Registry	MA-L (24-bit, large block)
Country	TW
Example MAC	00:40:01:00:00:00

What this means

The IEEE assigned the MA-L block 004001 to Zero One Technology Co. 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 00:40:01, it is Zero One Technology Co. Ltd. hardware.

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