Who owns MAC prefix 00203F?

00203F is registered to JUKI CORPORATION in the IEEE MA-L registry.

What devices use 00203F?

Any network device with a MAC address starting 00:20:3F was manufactured by or for JUKI CORPORATION.

MA-L · OUI prefix

JUKI CORPORATION

Any MAC address starting 00:20:3F is registered to JUKI CORPORATION in JP.

OUI prefix	00203F
Vendor	JUKI CORPORATION
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	00:20:3F:00:00:00

What this means

The IEEE assigned the MA-L block 00203F to JUKI CORPORATION. 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 00:20:3F, it is JUKI CORPORATION hardware.

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