What this means
The IEEE assigned the MA-M block 04585D5 to Sercomm Japan Corporation. 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:5, it is Sercomm Japan Corporation hardware.
Frequently Asked Questions
Who owns MAC prefix 04585D5?
04585D5 is registered to Sercomm Japan Corporation 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. Sercomm Japan Corporation's block covers 1,048,576 addresses.
What devices use 04585D5?
Any network device with a MAC address starting 04:58:5D:5 was manufactured by or for Sercomm Japan Corporation.