Who owns MAC prefix 70B3D50E4?

70B3D50E4 is registered to Walter Müller AG in the IEEE MA-S registry.

What devices use 70B3D50E4?

Any network device with a MAC address starting 70:B3:D5:0E:4 was manufactured by or for Walter Müller AG.

MA-S · OUI prefix

Walter Müller AG

Any MAC address starting 70:B3:D5:0E:4 is registered to Walter Müller AG in CH.

OUI prefix	70B3D50E4
Vendor	Walter Müller AG
Registry	MA-S (36-bit, small block)
Country	CH
Example MAC	70:B3:D5:0E:4:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D50E4 to Walter Müller AG. 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:D5:0E:4, it is Walter Müller AG hardware.

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