Anatomy of a MAC Address

This MAC address generator builds 48-bit addresses as six hex octets. With a vendor OUI selected, the first three octets identify the manufacturer and only the last three are randomized; the random mode draws all six.

Flag Bits

The first byte's two least-significant bits carry meaning: bit 0 marks multicast versus unicast, bit 1 marks locally administered versus globally unique. Vendor-assigned addresses are globally unique unicast — the generator reports any deviation.

Using Generated Addresses

Randomized MACs serve network testing, lab topologies, and privacy (as in phone MAC randomization). The last-digit distribution chart doubles as a quick randomness sanity check — uniform spread is expected from genuine random bytes.