What this means
The IEEE assigned the MA-L block 000528 to New Focus, Inc.. 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 00:05:28, it is New Focus, Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 000528?
000528 is registered to New Focus, Inc. 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. New Focus, Inc.'s block covers 16,777,216 addresses.
What devices use 000528?
Any network device with a MAC address starting 00:05:28 was manufactured by or for New Focus, Inc..