What this means
The IEEE assigned the MA-M block 04585D1 to Research Laboratory of Design Automation, 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 04:58:5D:1, it is Research Laboratory of Design Automation, Ltd. hardware.
Frequently Asked Questions
Who owns MAC prefix 04585D1?
04585D1 is registered to Research Laboratory of Design Automation, 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. Research Laboratory of Design Automation, Ltd.'s block covers 1,048,576 addresses.
What devices use 04585D1?
Any network device with a MAC address starting 04:58:5D:1 was manufactured by or for Research Laboratory of Design Automation, Ltd..