What this means
The IEEE assigned the MA-L block 640B4A to Digital Telecom Technology Limited. 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 64:0B:4A, it is Digital Telecom Technology Limited hardware.
Frequently Asked Questions
Who owns MAC prefix 640B4A?
640B4A is registered to Digital Telecom Technology Limited 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. Digital Telecom Technology Limited's block covers 16,777,216 addresses.
What devices use 640B4A?
Any network device with a MAC address starting 64:0B:4A was manufactured by or for Digital Telecom Technology Limited.