Who owns MAC prefix A4DA221?

A4DA221 is registered to T2T System in the IEEE MA-M registry.

What devices use A4DA221?

Any network device with a MAC address starting A4:DA:22:1 was manufactured by or for T2T System.

MA-M · OUI prefix

T2T System

Any MAC address starting A4:DA:22:1 is registered to T2T System in KR.

OUI prefix	A4DA221
Vendor	T2T System
Registry	MA-M (28-bit, medium block)
Country	KR
Example MAC	A4:DA:22:1:00:00:00

What this means

The IEEE assigned the MA-M block A4DA221 to T2T System. 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 A4:DA:22:1, it is T2T System hardware.

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