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MAC AddressOUI
Look up the vendor that registered a MAC address's Organizationally Unique Identifier (OUI) — the first 3 bytes. Accepts a full MAC address in any common format, or just the 6-hex-digit OUI by itself.
Examples:
Loading OUI database…
Data from the IEEE MA-L (24-bit OUI) public registry, refreshed monthly. Doesn’t cover the smaller MA-M/MA-S allocation blocks.