Who owns MAC prefix 70B3D5774?

70B3D5774 is registered to Micram Instruments Ltd in the IEEE MA-S registry.

What devices use 70B3D5774?

Any network device with a MAC address starting 70:B3:D5:77:4 was manufactured by or for Micram Instruments Ltd.

MA-S · OUI prefix

Micram Instruments Ltd

Any MAC address starting 70:B3:D5:77:4 is registered to Micram Instruments Ltd in NZ.

OUI prefix	70B3D5774
Vendor	Micram Instruments Ltd
Registry	MA-S (36-bit, small block)
Country	NZ
Example MAC	70:B3:D5:77:4:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D5774 to Micram Instruments Ltd. 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:D5:77:4, it is Micram Instruments Ltd hardware.

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