What this means
The IEEE assigned the MA-M block D425CC3 to EISST 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 D4:25:CC:3, it is EISST Ltd hardware.
Frequently Asked Questions
Who owns MAC prefix D425CC3?
D425CC3 is registered to EISST 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. EISST Ltd's block covers 1,048,576 addresses.
What devices use D425CC3?
Any network device with a MAC address starting D4:25:CC:3 was manufactured by or for EISST Ltd.