Who owns MAC prefix 5491AF1?

5491AF1 is registered to 4MITech in the IEEE MA-M registry.

What devices use 5491AF1?

Any network device with a MAC address starting 54:91:AF:1 was manufactured by or for 4MITech.

MA-M · OUI prefix

4MITech

Any MAC address starting 54:91:AF:1 is registered to 4MITech in KR.

OUI prefix	5491AF1
Vendor	4MITech
Registry	MA-M (28-bit, medium block)
Country	KR
Example MAC	54:91:AF:1:00:00:00

What this means

The IEEE assigned the MA-M block 5491AF1 to 4MITech. 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 54:91:AF:1, it is 4MITech hardware.

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