What this means
The IEEE assigned the MA-L block 643F5F to Exablaze. 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 64:3F:5F, it is Exablaze hardware.
Frequently Asked Questions
Who owns MAC prefix 643F5F?
643F5F is registered to Exablaze 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. Exablaze's block covers 16,777,216 addresses.
What devices use 643F5F?
Any network device with a MAC address starting 64:3F:5F was manufactured by or for Exablaze.