Who owns MAC prefix 28CCFF?

28CCFF is registered to Corporacion Empresarial Altra SL in the IEEE MA-L registry.

What devices use 28CCFF?

Any network device with a MAC address starting 28:CC:FF was manufactured by or for Corporacion Empresarial Altra SL.

MA-L · OUI prefix

Corporacion Empresarial Altra SL

Any MAC address starting 28:CC:FF is registered to Corporacion Empresarial Altra SL in ES.

OUI prefix	28CCFF
Vendor	Corporacion Empresarial Altra SL
Registry	MA-L (24-bit, large block)
Country	ES
Example MAC	28:CC:FF:00:00:00

What this means

The IEEE assigned the MA-L block 28CCFF to Corporacion Empresarial Altra SL. 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 28:CC:FF, it is Corporacion Empresarial Altra SL hardware.

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