Look up the vendor/OUI for a MAC address using bundled IEEE data
MAC Address
Accepts :, -, ., or no separator.
Lookup Result
Vendor
Vendor not in bundled OUI databaseOUI
001451Normalized MAC
00:14:51:00:00:01Cast Type
Unicast (I/G = 0)
Administration
Universally administered (U/L = 0)
About OUI Lookup
OUI (Organizationally Unique Identifier)
The first 24 bits of a MAC address identify the manufacturer. IEEE assigns these. This tool ships a curated subset of common vendor OUIs as a static asset — no network calls are made.
Limited Database
The bundled list contains ~200 popular OUIs (Apple, Cisco, Intel, Samsung, etc.) plus virtualization prefixes. For complete lookups, the full IEEE registry is publicly available.