What this means
The IEEE assigned the MA-L block 1C90FF to Tuya Smart Inc.. 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 1C:90:FF, it is Tuya Smart Inc. hardware.
Frequently Asked Questions
Who owns MAC prefix 1C90FF?
1C90FF is registered to Tuya Smart Inc. 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. Tuya Smart Inc.'s block covers 16,777,216 addresses.
What devices use 1C90FF?
Any network device with a MAC address starting 1C:90:FF was manufactured by or for Tuya Smart Inc..