What this means
The IEEE assigned the MA-S block 8C1F64C99 to Vinfast Trading and Production JSC. 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 8C:1F:64:C9:9, it is Vinfast Trading and Production JSC hardware.
Frequently Asked Questions
Who owns MAC prefix 8C1F64C99?
8C1F64C99 is registered to Vinfast Trading and Production JSC in the IEEE MA-S registry.
What does the MA-S registry type mean?
An MA-S assignment, formerly called OUI-36, covers 36 bits, giving the vendor 4,096 device addresses, the smallest block the IEEE issues. Vinfast Trading and Production JSC's block covers 4,096 addresses.
What devices use 8C1F64C99?
Any network device with a MAC address starting 8C:1F:64:C9:9 was manufactured by or for Vinfast Trading and Production JSC.