Who owns MAC prefix 7C3920?

7C3920 is registered to SSOMA SECURITY in the IEEE MA-L registry.

What devices use 7C3920?

Any network device with a MAC address starting 7C:39:20 was manufactured by or for SSOMA SECURITY.

MA-L · OUI prefix

SSOMA SECURITY

Any MAC address starting 7C:39:20 is registered to SSOMA SECURITY in KR.

OUI prefix	7C3920
Vendor	SSOMA SECURITY
Registry	MA-L (24-bit, large block)
Country	KR
Example MAC	7C:39:20:00:00:00

What this means

The IEEE assigned the MA-L block 7C3920 to SSOMA SECURITY. 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:39:20, it is SSOMA SECURITY hardware.

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