MAC Address Lookup

The first three bytes of a MAC address tell which manufacturer made the network chip, according to the public list of the IEEE. This way you can quickly see in your router whether an unknown device is a Raspberry Pi, a phone or a smart lamp.

Does it say "Private or random address"? Modern phones and laptops use a made-up MAC address per wifi network, so you cannot be tracked. That address does not belong to any manufacturer. You can turn this off per network in the wifi settings if you want to give the device a fixed address. Source of the manufacturers: IEEE Registration Authority.