Who owns MAC prefix B4CCE9?

B4CCE9 is registered to PROSYST in the IEEE MA-L registry.

What devices use B4CCE9?

Any network device with a MAC address starting B4:CC:E9 was manufactured by or for PROSYST.

MA-L · OUI prefix

PROSYST

Any MAC address starting B4:CC:E9 is registered to PROSYST in FR.

OUI prefix	B4CCE9
Vendor	PROSYST
Registry	MA-L (24-bit, large block)
Country	FR
Example MAC	B4:CC:E9:00:00:00

What this means

The IEEE assigned the MA-L block B4CCE9 to PROSYST. 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 B4:CC:E9, it is PROSYST hardware.

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