What this means
The IEEE assigned the MA-L block 00021F to Aculab PLC. 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 00:02:1F, it is Aculab PLC hardware.
Frequently Asked Questions
Who owns MAC prefix 00021F?
00021F is registered to Aculab PLC 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. Aculab PLC's block covers 16,777,216 addresses.
What devices use 00021F?
Any network device with a MAC address starting 00:02:1F was manufactured by or for Aculab PLC.