Who owns MAC prefix 445EF3?

445EF3 is registered to Tonalite Holding B.V. in the IEEE MA-L registry.

What devices use 445EF3?

Any network device with a MAC address starting 44:5E:F3 was manufactured by or for Tonalite Holding B.V..

MA-L · OUI prefix

Tonalite Holding B.V.

Any MAC address starting 44:5E:F3 is registered to Tonalite Holding B.V. in VA.

OUI prefix	445EF3
Vendor	Tonalite Holding B.V.
Registry	MA-L (24-bit, large block)
Country	VA
Example MAC	44:5E:F3:00:00:00

What this means

The IEEE assigned the MA-L block 445EF3 to Tonalite Holding B.V.. 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 44:5E:F3, it is Tonalite Holding B.V. hardware.

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