Who owns MAC prefix 001557?

001557 is registered to Olivetti in the IEEE MA-L registry.

What devices use 001557?

Any network device with a MAC address starting 00:15:57 was manufactured by or for Olivetti.

MA-L · OUI prefix

Olivetti

Any MAC address starting 00:15:57 is registered to Olivetti in IT.

OUI prefix	001557
Vendor	Olivetti
Registry	MA-L (24-bit, large block)
Country	IT
Example MAC	00:15:57:00:00:00

What this means

The IEEE assigned the MA-L block 001557 to Olivetti. 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 00:15:57, it is Olivetti hardware.

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