Who owns MAC prefix 70B3D581A?

70B3D581A is registered to Joehl & Koeferli AG in the IEEE MA-S registry.

What devices use 70B3D581A?

Any network device with a MAC address starting 70:B3:D5:81:A was manufactured by or for Joehl & Koeferli AG.

MA-S · OUI prefix

Joehl & Koeferli AG

Any MAC address starting 70:B3:D5:81:A is registered to Joehl & Koeferli AG in CH.

OUI prefix	70B3D581A
Vendor	Joehl & Koeferli AG
Registry	MA-S (36-bit, small block)
Country	CH
Example MAC	70:B3:D5:81:A:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D581A to Joehl & Koeferli 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:D5:81:A, it is Joehl & Koeferli AG hardware.

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