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MAC Addres

Good day!

I have an esp8266 running connected to a COM port. When I open the console and reboot the board, then the OS shows me the device's MAC addres. But, when I look at the connected devices in my network (look into arp table), I could see the MAC isn't the same. The MAC informed by Mongoose os starts with 5E:CF:7F, and I think ESPRESSIF's MAC address should start with 5C:CF:7F (i've cheked here: https://macvendors.com/)
Does Mongoose OS get the vendor's portion of MAC address from the chip or is it written in some file?

Thanks in advace!

BR

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