Who owns MAC prefix 3C99F7?

3C99F7 is registered to Lansentechnology AB in the IEEE MA-L registry.

What devices use 3C99F7?

Any network device with a MAC address starting 3C:99:F7 was manufactured by or for Lansentechnology AB.

MA-L · OUI prefix

Lansentechnology AB

Any MAC address starting 3C:99:F7 is registered to Lansentechnology AB in SE.

OUI prefix	3C99F7
Vendor	Lansentechnology AB
Registry	MA-L (24-bit, large block)
Country	SE
Example MAC	3C:99:F7:00:00:00

What this means

The IEEE assigned the MA-L block 3C99F7 to Lansentechnology AB. 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 3C:99:F7, it is Lansentechnology AB hardware.

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