Who owns MAC prefix 0C2138?

0C2138 is registered to Hengstler GmbH in the IEEE MA-L registry.

What devices use 0C2138?

Any network device with a MAC address starting 0C:21:38 was manufactured by or for Hengstler GmbH.

MA-L · OUI prefix

Hengstler GmbH

Any MAC address starting 0C:21:38 is registered to Hengstler GmbH in DE.

OUI prefix	0C2138
Vendor	Hengstler GmbH
Registry	MA-L (24-bit, large block)
Country	DE
Example MAC	0C:21:38:00:00:00

What this means

The IEEE assigned the MA-L block 0C2138 to Hengstler 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 0C:21:38, it is Hengstler GmbH hardware.

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