Who owns MAC prefix 643F5F?

643F5F is registered to Exablaze in the IEEE MA-L registry.

What devices use 643F5F?

Any network device with a MAC address starting 64:3F:5F was manufactured by or for Exablaze.

MA-L · OUI prefix

Exablaze

Any MAC address starting 64:3F:5F is registered to Exablaze in AU.

OUI prefix	643F5F
Vendor	Exablaze
Registry	MA-L (24-bit, large block)
Country	AU
Example MAC	64:3F:5F:00:00:00

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.

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