Who owns MAC prefix E481B3?

E481B3 is registered to Shenzhen ACT Industrial Co.,Ltd. in the IEEE MA-L registry.

What devices use E481B3?

Any network device with a MAC address starting E4:81:B3 was manufactured by or for Shenzhen ACT Industrial Co.,Ltd..

MA-L · OUI prefix

Shenzhen ACT Industrial Co.,Ltd.

Any MAC address starting E4:81:B3 is registered to Shenzhen ACT Industrial Co.,Ltd. in CN.

OUI prefix	E481B3
Vendor	Shenzhen ACT Industrial Co.,Ltd.
Registry	MA-L (24-bit, large block)
Country	CN
Example MAC	E4:81:B3:00:00:00

What this means

The IEEE assigned the MA-L block E481B3 to Shenzhen ACT Industrial Co.,Ltd.. 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 E4:81:B3, it is Shenzhen ACT Industrial Co.,Ltd. hardware.

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