What this means
The IEEE assigned the MA-L block B03055 to China Mobile IOT Company 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 B0:30:55, it is China Mobile IOT Company Limited hardware.
Frequently Asked Questions
Who owns MAC prefix B03055?
B03055 is registered to China Mobile IOT Company 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. China Mobile IOT Company Limited's block covers 16,777,216 addresses.
What devices use B03055?
Any network device with a MAC address starting B0:30:55 was manufactured by or for China Mobile IOT Company Limited.