Who owns MAC prefix 90C99B?

90C99B is registered to Tesorion Nederland B.V. in the IEEE MA-L registry.

What devices use 90C99B?

Any network device with a MAC address starting 90:C9:9B was manufactured by or for Tesorion Nederland B.V..

MA-L · OUI prefix

Tesorion Nederland B.V.

Any MAC address starting 90:C9:9B is registered to Tesorion Nederland B.V. in PG.

OUI prefix	90C99B
Vendor	Tesorion Nederland B.V.
Registry	MA-L (24-bit, large block)
Country	PG
Example MAC	90:C9:9B:00:00:00

What this means

The IEEE assigned the MA-L block 90C99B to Tesorion Nederland B.V.. 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 90:C9:9B, it is Tesorion Nederland B.V. hardware.

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