Radio Frequency Systems - MAC Prefix 0021AF (MA-L)

What this means

The IEEE assigned the MA-L block 0021AF to Radio Frequency Systems. 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:AF, it is Radio Frequency Systems hardware.

Frequently Asked Questions

Who owns MAC prefix 0021AF?

0021AF is registered to Radio Frequency Systems 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. Radio Frequency Systems's block covers 16,777,216 addresses.

What devices use 0021AF?

Any network device with a MAC address starting 00:21:AF was manufactured by or for Radio Frequency Systems.

OUI prefix	0021AF
Vendor	Radio Frequency Systems
Registry	MA-L (24-bit, large block)
Block size	16,777,216 addresses
Country	DE
Other blocks by this vendor	1 total
Example MAC	00:21:AF:00:00:00