Who owns MAC prefix 70B3D590B?

70B3D590B is registered to Matrix Switch Corporation in the IEEE MA-S registry.

What devices use 70B3D590B?

Any network device with a MAC address starting 70:B3:D5:90:B was manufactured by or for Matrix Switch Corporation.

MA-S · OUI prefix

Matrix Switch Corporation

Any MAC address starting 70:B3:D5:90:B is registered to Matrix Switch Corporation in US.

OUI prefix	70B3D590B
Vendor	Matrix Switch Corporation
Registry	MA-S (36-bit, small block)
Country	US
Example MAC	70:B3:D5:90:B:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D590B to Matrix Switch Corporation. 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 70:B3:D5:90:B, it is Matrix Switch Corporation hardware.

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