Who owns MAC prefix 7C3E9D?

7C3E9D is registered to PATECH in the IEEE MA-L registry.

What devices use 7C3E9D?

Any network device with a MAC address starting 7C:3E:9D was manufactured by or for PATECH.

MA-L · OUI prefix

PATECH

Any MAC address starting 7C:3E:9D is registered to PATECH in KR.

OUI prefix	7C3E9D
Vendor	PATECH
Registry	MA-L (24-bit, large block)
Country	KR
Example MAC	7C:3E:9D:00:00:00

What this means

The IEEE assigned the MA-L block 7C3E9D to PATECH. 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 7C:3E:9D, it is PATECH hardware.

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