What this means
The IEEE assigned the MA-L block 001983 to CCT R&D 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 00:19:83, it is CCT R&D Limited hardware.
Frequently Asked Questions
Who owns MAC prefix 001983?
001983 is registered to CCT R&D 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. CCT R&D Limited's block covers 16,777,216 addresses.
What devices use 001983?
Any network device with a MAC address starting 00:19:83 was manufactured by or for CCT R&D Limited.