Who owns MAC prefix 70B3D557A?

70B3D557A is registered to Rhythm Engineering, LLC. in the IEEE MA-S registry.

What devices use 70B3D557A?

Any network device with a MAC address starting 70:B3:D5:57:A was manufactured by or for Rhythm Engineering, LLC..

MA-S · OUI prefix

Rhythm Engineering, LLC.

Any MAC address starting 70:B3:D5:57:A is registered to Rhythm Engineering, LLC. in US.

OUI prefix	70B3D557A
Vendor	Rhythm Engineering, LLC.
Registry	MA-S (36-bit, small block)
Country	US
Example MAC	70:B3:D5:57:A:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D557A to Rhythm Engineering, LLC.. 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:D5:57:A, it is Rhythm Engineering, LLC. hardware.

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