What this means
The IEEE assigned the MA-L block 00031A to Beijing Broad Telecom Ltd., China. 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 00:03:1A, it is Beijing Broad Telecom Ltd., China hardware.
Frequently Asked Questions
Who owns MAC prefix 00031A?
00031A is registered to Beijing Broad Telecom Ltd., China 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. Beijing Broad Telecom Ltd., China's block covers 16,777,216 addresses.
What devices use 00031A?
Any network device with a MAC address starting 00:03:1A was manufactured by or for Beijing Broad Telecom Ltd., China.