Who owns MAC prefix 000133?

000133 is registered to KYOWA Electronic Instruments C in the IEEE MA-L registry.

What devices use 000133?

Any network device with a MAC address starting 00:01:33 was manufactured by or for KYOWA Electronic Instruments C.

MA-L · OUI prefix

KYOWA Electronic Instruments C

Any MAC address starting 00:01:33 is registered to KYOWA Electronic Instruments C in JP.

OUI prefix	000133
Vendor	KYOWA Electronic Instruments C
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	00:01:33:00:00:00

What this means

The IEEE assigned the MA-L block 000133 to KYOWA Electronic Instruments C. 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 00:01:33, it is KYOWA Electronic Instruments C hardware.

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