Who owns MAC prefix 004031?

004031 is registered to KOKUSAI DENKI Electric Inc. in the IEEE MA-L registry.

What devices use 004031?

Any network device with a MAC address starting 00:40:31 was manufactured by or for KOKUSAI DENKI Electric Inc..

MA-L · OUI prefix

KOKUSAI DENKI Electric Inc.

Any MAC address starting 00:40:31 is registered to KOKUSAI DENKI Electric Inc. in JP.

OUI prefix	004031
Vendor	KOKUSAI DENKI Electric Inc.
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	00:40:31:00:00:00

What this means

The IEEE assigned the MA-L block 004031 to KOKUSAI DENKI Electric Inc.. 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 00:40:31, it is KOKUSAI DENKI Electric Inc. hardware.

Other KOKUSAI DENKI Electric Inc. prefixes

KOKUSAI DENKI Electric Inc. holds 2 registered blocks in total.

000346

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