Who owns MAC prefix 001931?

001931 is registered to Balluff GmbH in the IEEE MA-L registry.

What devices use 001931?

Any network device with a MAC address starting 00:19:31 was manufactured by or for Balluff GmbH.

MA-L · OUI prefix

Balluff GmbH

Any MAC address starting 00:19:31 is registered to Balluff GmbH in DE.

OUI prefix	001931
Vendor	Balluff GmbH
Registry	MA-L (24-bit, large block)
Country	DE
Example MAC	00:19:31:00:00:00

What this means

The IEEE assigned the MA-L block 001931 to Balluff GmbH. 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 00:19:31, it is Balluff GmbH hardware.

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