What this means
The IEEE assigned the MA-M block 904E917 to IBM. 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 90:4E:91:7, it is IBM hardware.
Frequently Asked Questions
Who owns MAC prefix 904E917?
904E917 is registered to IBM 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. IBM's block covers 1,048,576 addresses.
What devices use 904E917?
Any network device with a MAC address starting 90:4E:91:7 was manufactured by or for IBM.