What this means
The IEEE assigned the MA-L block B04519 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 B0:45:19, it is TCT mobile ltd hardware.
Frequently Asked Questions
Who owns MAC prefix B04519?
B04519 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 B04519?
Any network device with a MAC address starting B0:45:19 was manufactured by or for TCT mobile ltd.