What this means
The IEEE assigned the MA-L block 405F7D to TCT mobile ltd. 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 40:5F:7D, it is TCT mobile ltd hardware.
Frequently Asked Questions
Who owns MAC prefix 405F7D?
405F7D is registered to TCT mobile ltd 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. TCT mobile ltd's block covers 16,777,216 addresses.
What devices use 405F7D?
Any network device with a MAC address starting 40:5F:7D was manufactured by or for TCT mobile ltd.