Who owns MAC prefix F88DEF?

F88DEF is registered to Tenebraex in the IEEE MA-L registry.

What devices use F88DEF?

Any network device with a MAC address starting F8:8D:EF was manufactured by or for Tenebraex.

MA-L · OUI prefix

Tenebraex

Any MAC address starting F8:8D:EF is registered to Tenebraex in US.

OUI prefix	F88DEF
Vendor	Tenebraex
Registry	MA-L (24-bit, large block)
Country	US
Example MAC	F8:8D:EF:00:00:00

What this means

The IEEE assigned the MA-L block F88DEF to Tenebraex. 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 F8:8D:EF, it is Tenebraex hardware.

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