Who owns MAC prefix 0040B4?

0040B4 is registered to NEXTCOM K.K. in the IEEE MA-L registry.

What devices use 0040B4?

Any network device with a MAC address starting 00:40:B4 was manufactured by or for NEXTCOM K.K..

MA-L · OUI prefix

NEXTCOM K.K.

Any MAC address starting 00:40:B4 is registered to NEXTCOM K.K. in JP.

OUI prefix	0040B4
Vendor	NEXTCOM K.K.
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	00:40:B4:00:00:00

What this means

The IEEE assigned the MA-L block 0040B4 to NEXTCOM K.K.. 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:B4, it is NEXTCOM K.K. hardware.

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