What this means
The IEEE assigned the MA-M block 40F385D to Digital Bros S.p.A.. 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:F3:85:D, it is Digital Bros S.p.A. hardware.
Frequently Asked Questions
Who owns MAC prefix 40F385D?
40F385D is registered to Digital Bros S.p.A. 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. Digital Bros S.p.A.'s block covers 1,048,576 addresses.
What devices use 40F385D?
Any network device with a MAC address starting 40:F3:85:D was manufactured by or for Digital Bros S.p.A..