What this means
The IEEE assigned the MA-L block 90C99B to Tesorion Nederland 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 90:C9:9B, it is Tesorion Nederland B.V. hardware.
Frequently Asked Questions
Who owns MAC prefix 90C99B?
90C99B is registered to Tesorion Nederland 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. Tesorion Nederland B.V.'s block covers 16,777,216 addresses.
What devices use 90C99B?
Any network device with a MAC address starting 90:C9:9B was manufactured by or for Tesorion Nederland B.V..