Who owns MAC prefix 2091D9?

2091D9 is registered to I'M SPA in the IEEE MA-L registry.

What devices use 2091D9?

Any network device with a MAC address starting 20:91:D9 was manufactured by or for I'M SPA.

MA-L · OUI prefix

I'M SPA

Any MAC address starting 20:91:D9 is registered to I'M SPA in IT.

OUI prefix	2091D9
Vendor	I'M SPA
Registry	MA-L (24-bit, large block)
Country	IT
Example MAC	20:91:D9:00:00:00

What this means

The IEEE assigned the MA-L block 2091D9 to I'M SPA. 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 20:91:D9, it is I'M SPA hardware.

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