Who owns MAC prefix 04AC44?

04AC44 is registered to Holtek Semiconductor Inc. in the IEEE MA-L registry.

What devices use 04AC44?

Any network device with a MAC address starting 04:AC:44 was manufactured by or for Holtek Semiconductor Inc..

MA-L · OUI prefix

Holtek Semiconductor Inc.

Any MAC address starting 04:AC:44 is registered to Holtek Semiconductor Inc. in TW.

OUI prefix	04AC44
Vendor	Holtek Semiconductor Inc.
Registry	MA-L (24-bit, large block)
Country	TW
Example MAC	04:AC:44:00:00:00

What this means

The IEEE assigned the MA-L block 04AC44 to Holtek Semiconductor 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 04:AC:44, it is Holtek Semiconductor Inc. hardware.

Other Holtek Semiconductor Inc. prefixes

Holtek Semiconductor Inc. holds 2 registered blocks in total.

B8CA04

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