Who owns MAC prefix 641E81?

641E81 is registered to Dowslake Microsystems in the IEEE MA-L registry.

What devices use 641E81?

Any network device with a MAC address starting 64:1E:81 was manufactured by or for Dowslake Microsystems.

MA-L · OUI prefix

Dowslake Microsystems

Any MAC address starting 64:1E:81 is registered to Dowslake Microsystems in US.

OUI prefix	641E81
Vendor	Dowslake Microsystems
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	64:1E:81:00:00:00

What this means

The IEEE assigned the MA-L block 641E81 to Dowslake Microsystems. 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 64:1E:81, it is Dowslake Microsystems hardware.

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