Who owns MAC prefix 0022B3?

0022B3 is registered to Sei S.p.A. in the IEEE MA-L registry.

What devices use 0022B3?

Any network device with a MAC address starting 00:22:B3 was manufactured by or for Sei S.p.A..

MA-L · OUI prefix

Sei S.p.A.

Any MAC address starting 00:22:B3 is registered to Sei S.p.A. in IT.

OUI prefix	0022B3
Vendor	Sei S.p.A.
Registry	MA-L (24-bit, large block)
Country	IT
Example MAC	00:22:B3:00:00:00

What this means

The IEEE assigned the MA-L block 0022B3 to Sei S.p.A.. 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 00:22:B3, it is Sei S.p.A. hardware.

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