Who owns MAC prefix 70B3D5311?

70B3D5311 is registered to Günther Spelsberg GmbH + Co. KG in the IEEE MA-S registry.

What devices use 70B3D5311?

Any network device with a MAC address starting 70:B3:D5:31:1 was manufactured by or for Günther Spelsberg GmbH + Co. KG.

MA-S · OUI prefix

Günther Spelsberg GmbH + Co. KG

Any MAC address starting 70:B3:D5:31:1 is registered to Günther Spelsberg GmbH + Co. KG in DE.

OUI prefix	70B3D5311
Vendor	Günther Spelsberg GmbH + Co. KG
Registry	MA-S (36-bit, small block)
Country	DE
Example MAC	70:B3:D5:31:1:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D5311 to Günther Spelsberg GmbH + Co. KG. 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:D5:31:1, it is Günther Spelsberg GmbH + Co. KG hardware.

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