Who owns MAC prefix 70533F?

70533F is registered to Alfa Instrumentos Eletronicos Ltda. in the IEEE MA-L registry.

What devices use 70533F?

Any network device with a MAC address starting 70:53:3F was manufactured by or for Alfa Instrumentos Eletronicos Ltda..

MA-L · OUI prefix

Alfa Instrumentos Eletronicos Ltda.

Any MAC address starting 70:53:3F is registered to Alfa Instrumentos Eletronicos Ltda. in BR.

OUI prefix	70533F
Vendor	Alfa Instrumentos Eletronicos Ltda.
Registry	MA-L (24-bit, large block)
Country	BR
Example MAC	70:53:3F:00:00:00

What this means

The IEEE assigned the MA-L block 70533F to Alfa Instrumentos Eletronicos Ltda.. 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 70:53:3F, it is Alfa Instrumentos Eletronicos Ltda. hardware.

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