What this means
The IEEE assigned the MA-M block 643139E to ATG UV Technology. 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 64:31:39:E, it is ATG UV Technology hardware.
Frequently Asked Questions
Who owns MAC prefix 643139E?
643139E is registered to ATG UV Technology in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. ATG UV Technology's block covers 1,048,576 addresses.
What devices use 643139E?
Any network device with a MAC address starting 64:31:39:E was manufactured by or for ATG UV Technology.