Who owns MAC prefix D4C766?

D4C766 is registered to Acentic GmbH in the IEEE MA-L registry.

What devices use D4C766?

Any network device with a MAC address starting D4:C7:66 was manufactured by or for Acentic GmbH.

MA-L · OUI prefix

Acentic GmbH

Any MAC address starting D4:C7:66 is registered to Acentic GmbH in DE.

OUI prefix	D4C766
Vendor	Acentic GmbH
Registry	MA-L (24-bit, large block)
Country	DE
Example MAC	D4:C7:66:00:00:00

What this means

The IEEE assigned the MA-L block D4C766 to Acentic 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 D4:C7:66, it is Acentic GmbH hardware.

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