Who owns MAC prefix 00210A?

00210A is registered to byd:sign Corporation in the IEEE MA-L registry.

What devices use 00210A?

Any network device with a MAC address starting 00:21:0A was manufactured by or for byd:sign Corporation.

MA-L · OUI prefix

byd:sign Corporation

Any MAC address starting 00:21:0A is registered to byd:sign Corporation in JP.

OUI prefix	00210A
Vendor	byd:sign Corporation
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	00:21:0A:00:00:00

What this means

The IEEE assigned the MA-L block 00210A to byd:sign 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 00:21:0A, it is byd:sign Corporation hardware.

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