Who owns MAC prefix 00A05D?

00A05D is registered to CS COMPUTER SYSTEME GmbH in the IEEE MA-L registry.

What devices use 00A05D?

Any network device with a MAC address starting 00:A0:5D was manufactured by or for CS COMPUTER SYSTEME GmbH.

MA-L · OUI prefix

CS COMPUTER SYSTEME GmbH

Any MAC address starting 00:A0:5D is registered to CS COMPUTER SYSTEME GmbH in DE.

OUI prefix	00A05D
Vendor	CS COMPUTER SYSTEME GmbH
Registry	MA-L (24-bit, large block)
Country	DE
Example MAC	00:A0:5D:00:00:00

What this means

The IEEE assigned the MA-L block 00A05D to CS COMPUTER SYSTEME 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:A0:5D, it is CS COMPUTER SYSTEME GmbH hardware.

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