Source: cirosantilli/mac-address

= MAC address
{c}
{wiki}

Hardcoded and unique network addresses for every single device on <Earth>.

Started with 48 bits (6 bytes), usually given as 01:23:45:67:89:AB but people now encouraged to use 64-bit ones.

How they are assigned: https://www.quora.com/How-are-MAC-addresses-assigned Basically <IEEE> gives out the 3 first bytes to device manufacturers that register, this is called the <organizationally unique identifier>, and then each manufacturer keeps their own devices unique.