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.
Frequently Asked Questions
Who owns MAC prefix 445EF3?
445EF3 is registered to Tonalite Holding B.V. in the IEEE MA-L registry.
What does the MA-L registry type mean?
An MA-L assignment, the IEEE's original OUI format, gives the vendor the first three octets and 16,777,216 device addresses under them. Tonalite Holding B.V.'s block covers 16,777,216 addresses.
What devices use 445EF3?
Any network device with a MAC address starting 44:5E:F3 was manufactured by or for Tonalite Holding B.V..