Who owns MAC prefix AC583B?

AC583B is registered to Human Assembler, Inc. in the IEEE MA-L registry.

What devices use AC583B?

Any network device with a MAC address starting AC:58:3B was manufactured by or for Human Assembler, Inc..

MA-L · OUI prefix

Human Assembler, Inc.

Any MAC address starting AC:58:3B is registered to Human Assembler, Inc. in JP.

OUI prefix	AC583B
Vendor	Human Assembler, Inc.
Registry	MA-L (24-bit, large block)
Country	JP
Example MAC	AC:58:3B:00:00:00

What this means

The IEEE assigned the MA-L block AC583B to Human Assembler, Inc.. 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 AC:58:3B, it is Human Assembler, Inc. hardware.

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