What this means
The IEEE assigned the MA-M block 401175A to BWT Tianjin 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 40:11:75:A, it is BWT Tianjin Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 401175A?
401175A is registered to BWT Tianjin Ltd. in the IEEE MA-M registry.
What does the MA-M registry type mean?
An MA-M assignment covers 28 bits of the address, giving the vendor 1,048,576 device addresses, a quarter of a full MA-L block. BWT Tianjin Ltd.'s block covers 1,048,576 addresses.
What devices use 401175A?
Any network device with a MAC address starting 40:11:75:A was manufactured by or for BWT Tianjin Ltd..