Who owns MAC prefix 0CEFAF5?

0CEFAF5 is registered to PREMIUM SA in the IEEE MA-M registry.

What devices use 0CEFAF5?

Any network device with a MAC address starting 0C:EF:AF:5 was manufactured by or for PREMIUM SA.

MA-M · OUI prefix

PREMIUM SA

Any MAC address starting 0C:EF:AF:5 is registered to PREMIUM SA in ES.

OUI prefix	0CEFAF5
Vendor	PREMIUM SA
Registry	MA-M (28-bit, medium block)
Country	ES
Example MAC	0C:EF:AF:5:00:00:00

What this means

The IEEE assigned the MA-M block 0CEFAF5 to PREMIUM SA. 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 0C:EF:AF:5, it is PREMIUM SA hardware.

Look up another MAC