Who owns MAC prefix C0DF77?

C0DF77 is registered to Conrad Electronic SE in the IEEE MA-L registry.

What devices use C0DF77?

Any network device with a MAC address starting C0:DF:77 was manufactured by or for Conrad Electronic SE.

MA-L · OUI prefix

Conrad Electronic SE

Any MAC address starting C0:DF:77 is registered to Conrad Electronic SE in DE.

OUI prefix	C0DF77
Vendor	Conrad Electronic SE
Registry	MA-L (24-bit, large block)
Country	DE
Example MAC	C0:DF:77:00:00:00

What this means

The IEEE assigned the MA-L block C0DF77 to Conrad Electronic SE. 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 C0:DF:77, it is Conrad Electronic SE hardware.

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