Who owns MAC prefix 70B3D5909?

70B3D5909 is registered to tetronik GmbH AEN in the IEEE MA-S registry.

What devices use 70B3D5909?

Any network device with a MAC address starting 70:B3:D5:90:9 was manufactured by or for tetronik GmbH AEN.

MA-S · OUI prefix

tetronik GmbH AEN

Any MAC address starting 70:B3:D5:90:9 is registered to tetronik GmbH AEN in DE.

OUI prefix	70B3D5909
Vendor	tetronik GmbH AEN
Registry	MA-S (36-bit, small block)
Country	DE
Example MAC	70:B3:D5:90:9:00:00:00

What this means

The IEEE assigned the MA-S block 70B3D5909 to tetronik GmbH AEN. 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:D5:90:9, it is tetronik GmbH AEN hardware.

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