What this means
The IEEE assigned the MA-L block 4099F6 to Telink Semiconductor(Shanghai) Co.,Ltd. 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 40:99:F6, it is Telink Semiconductor(Shanghai) Co.,Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 4099F6?
4099F6 is registered to Telink Semiconductor(Shanghai) Co.,Ltd 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. Telink Semiconductor(Shanghai) Co.,Ltd's block covers 16,777,216 addresses.
What devices use 4099F6?
Any network device with a MAC address starting 40:99:F6 was manufactured by or for Telink Semiconductor(Shanghai) Co.,Ltd.