What this means
The IEEE assigned the MA-M block 58FCDB0 to Spang Power Electronics. 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 58:FC:DB:0, it is Spang Power Electronics hardware.
Frequently Asked Questions
Who owns MAC prefix 58FCDB0?
58FCDB0 is registered to Spang Power Electronics 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. Spang Power Electronics's block covers 1,048,576 addresses.
What devices use 58FCDB0?
Any network device with a MAC address starting 58:FC:DB:0 was manufactured by or for Spang Power Electronics.