MAC Address / OUI Lookup

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.

Data from the IEEE MA-L (24-bit OUI) public registry, refreshed monthly. Doesn’t cover the smaller MA-M/MA-S allocation blocks.

Provided as-is, with no warranty of any kind. Results depend on third-party public APIs and registries, which can be incomplete, delayed, or temporarily unavailable — always verify anything important independently. See the full disclaimer.