Who owns MAC prefix F490CB9?

F490CB9 is registered to Fractyl Labs in the IEEE MA-M registry.

What devices use F490CB9?

Any network device with a MAC address starting F4:90:CB:9 was manufactured by or for Fractyl Labs.

MA-M · OUI prefix

Fractyl Labs

Any MAC address starting F4:90:CB:9 is registered to Fractyl Labs in US.

OUI prefix	F490CB9
Vendor	Fractyl Labs
Registry	MA-M (28-bit, medium block)
Country	US
Example MAC	F4:90:CB:9:00:00:00

What this means

The IEEE assigned the MA-M block F490CB9 to Fractyl Labs. 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 F4:90:CB:9, it is Fractyl Labs hardware.

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