Who owns MAC prefix 189BA5C?

189BA5C is registered to Christ Electronic System GmbH in the IEEE MA-M registry.

What devices use 189BA5C?

Any network device with a MAC address starting 18:9B:A5:C was manufactured by or for Christ Electronic System GmbH.

MA-M · OUI prefix

Christ Electronic System GmbH

Any MAC address starting 18:9B:A5:C is registered to Christ Electronic System GmbH in DE.

OUI prefix	189BA5C
Vendor	Christ Electronic System GmbH
Registry	MA-M (28-bit, medium block)
Country	DE
Example MAC	18:9B:A5:C:00:00:00

What this means

The IEEE assigned the MA-M block 189BA5C to Christ Electronic System 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 18:9B:A5:C, it is Christ Electronic System GmbH hardware.

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