What this means
The IEEE assigned the MA-L block 580943 to Private. 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 58:09:43, it is Private hardware.
Frequently Asked Questions
Who owns MAC prefix 580943?
580943 is registered to Private 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. Private's block covers 16,777,216 addresses.
What devices use 580943?
Any network device with a MAC address starting 58:09:43 was manufactured by or for Private.