What this means
The IEEE assigned the MA-L block 00219A to Cambridge Visual Networks Ltd. 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 00:21:9A, it is Cambridge Visual Networks Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 00219A?
00219A is registered to Cambridge Visual Networks Ltd 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. Cambridge Visual Networks Ltd's block covers 16,777,216 addresses.
What devices use 00219A?
Any network device with a MAC address starting 00:21:9A was manufactured by or for Cambridge Visual Networks Ltd.