What this means
The IEEE assigned the MA-M block 6433B57 to ABB Electrification Smart Power (ELSP). 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 64:33:B5:7, it is ABB Electrification Smart Power (ELSP) hardware.
Frequently Asked Questions
Who owns MAC prefix 6433B57?
6433B57 is registered to ABB Electrification Smart Power (ELSP) 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. ABB Electrification Smart Power (ELSP)'s block covers 1,048,576 addresses.
What devices use 6433B57?
Any network device with a MAC address starting 64:33:B5:7 was manufactured by or for ABB Electrification Smart Power (ELSP).