Who owns MAC prefix 70B3D5633?

70B3D5633 is registered to OBSERVER FOUNDATION in the IEEE MA-S registry.

What devices use 70B3D5633?

Any network device with a MAC address starting 70:B3:D5:63:3 was manufactured by or for OBSERVER FOUNDATION.

MA-S · OUI prefix

OBSERVER FOUNDATION

Any MAC address starting 70:B3:D5:63:3 is registered to OBSERVER FOUNDATION in EE.

OUI prefix	70B3D5633
Vendor	OBSERVER FOUNDATION
Registry	MA-S (36-bit, small block)
Country	EE
Example MAC	70:B3:D5:63:3:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D5633 to OBSERVER FOUNDATION. 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:D5:63:3, it is OBSERVER FOUNDATION hardware.

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