What devices use 001B7F?

Any network device with a MAC address starting 00:1B:7F was manufactured by or for TMN Technologies Telecomunicacoes Ltda.

MA-L · OUI prefix

TMN Technologies Telecomunicacoes Ltda

Q: Who owns MAC prefix 001B7F?

001B7F is registered to TMN Technologies Telecomunicacoes Ltda in the IEEE MA-L registry.

Any MAC address starting 00:1B:7F is registered to TMN Technologies Telecomunicacoes Ltda in BR.

OUI prefix	001B7F
Vendor	TMN Technologies Telecomunicacoes Ltda
Registry	MA-L (24-bit, large block)
Country	BR
Example MAC	00:1B:7F:00:00:00

What this means

The IEEE assigned the MA-L block 001B7F to TMN Technologies Telecomunicacoes 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 00:1B:7F, it is TMN Technologies Telecomunicacoes Ltda hardware.

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