Who owns MAC prefix 6433B57?

6433B57 is registered to ABB Electrification Smart Power (ELSP) in the IEEE MA-M registry.

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).

MA-M · OUI prefix

ABB Electrification Smart Power (ELSP)

Any MAC address starting 64:33:B5:7 is registered to ABB Electrification Smart Power (ELSP) in NZ.

OUI prefix	6433B57
Vendor	ABB Electrification Smart Power (ELSP)
Registry	MA-M (28-bit, medium block)
Country	NZ
Example MAC	64:33:B5:7:00:00:00

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.

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