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.
Frequently Asked Questions
Who owns MAC prefix 00210A?
00210A is registered to byd:sign Corporation in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. byd:sign Corporation's block covers 16,777,216 addresses.
What devices use 00210A?
Any network device with a MAC address starting 00:21:0A was manufactured by or for byd:sign Corporation.