What this means
The IEEE assigned the MA-M block 4011759 to ADH Guardian USA. 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 40:11:75:9, it is ADH Guardian USA hardware.
Frequently Asked Questions
Who owns MAC prefix 4011759?
4011759 is registered to ADH Guardian USA 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. ADH Guardian USA's block covers 1,048,576 addresses.
What devices use 4011759?
Any network device with a MAC address starting 40:11:75:9 was manufactured by or for ADH Guardian USA.