MAC address lookup
Find the vendor that owns a MAC address OUI prefix.
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About the mac address lookup
Looks up the manufacturer behind a MAC address in the public IEEE MA-L registry, covering nearly forty thousand assigned prefixes. It also reports whether the address is unicast or multicast and whether it is a burned-in or locally administered address.
Frequently asked questions
Why does my phone's MAC show no vendor?
Modern phones randomise their MAC per network for privacy. Randomised addresses set the locally-administered bit and use a prefix nobody owns, so there is nothing to look up.
What exactly is an OUI?
The Organisationally Unique Identifier — the first three bytes, bought from the IEEE by the manufacturer. The remaining three bytes are assigned by the vendor to individual devices.