MAC Address Lookup Tool [IEEE OUI/Vendor Code] - Meridian Outpost
https://www.meridianoutpost.com/resources/etools/network/ieee-oui-lookup.php
Every device that communicates on a network is assigned a unique 6-byte (48-bit) Media Access Control (MAC) address by the manufacturer. This address, also called a hardware address or physical address, is baked onto the ROM firmware (sometimes referred to as the burned in address) of the network card, router, firewall, network switch, wireless access point, and other networking devices ...