What this means
The IEEE assigned the MA-L block 640552 to China Post Communication Equipment Co.,. 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 64:05:52, it is China Post Communication Equipment Co., hardware.
Frequently Asked Questions
Who owns MAC prefix 640552?
640552 is registered to China Post Communication Equipment Co., 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. China Post Communication Equipment Co.,'s block covers 16,777,216 addresses.
What devices use 640552?
Any network device with a MAC address starting 64:05:52 was manufactured by or for China Post Communication Equipment Co.,.