Who owns MAC prefix 8C1F6421C?

8C1F6421C is registered to LLC "EMS-Expert" in the IEEE MA-S registry.

What devices use 8C1F6421C?

Any network device with a MAC address starting 8C:1F:64:21:C was manufactured by or for LLC "EMS-Expert".

MA-S · OUI prefix

LLC "EMS-Expert"

Any MAC address starting 8C:1F:64:21:C is registered to LLC "EMS-Expert" in RU.

OUI prefix	8C1F6421C
Vendor	LLC "EMS-Expert"
Registry	MA-S (36-bit, small block)
Country	RU
Example MAC	8C:1F:64:21:C:00:00:00

What this means

The IEEE assigned the MA-S block 8C1F6421C to LLC "EMS-Expert". 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 8C:1F:64:21:C, it is LLC "EMS-Expert" hardware.

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