MAC Address Lookup

Looks up the hardware vendor and manufacturer registered to a MAC address's OUI (the first three octets, which IEEE assigns per-manufacturer). Useful for identifying unknown devices on a network — a MAC address showing up in a DHCP lease list or ARP table that resolves to a known vendor tells you a lot more than the raw address alone. Keep in mind that many modern devices randomize their MAC address for Wi-Fi by default, so a lookup returning no reliable match on a wireless device is often expected behavior.

The OUI only identifies the manufacturer of the network interface, not the device model or owner — two completely different devices from the same manufacturer will share the same OUI prefix.

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