MAC Address Lookup

MAC Address Lookup is a free tool that identifies the vendor behind any MAC address or OUI prefix. Paste a full or partial address and the tool matches it against the complete IEEE Registration Authority registries (MA-L, MA-M, MA-S, IAB and CID) with longest-prefix matching, so small blocks resolve to the correct organization. Everything runs in your browser. The IEEE dataset loads as static files, all searching happens locally, and the addresses you look up are never sent to a server. There…