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MAC Address Vendor Lookup
Look up the manufacturer and vendor of any device by its MAC address OUI. Instantly identify network hardware makers. Free, fast, and private.
e.g. 00:1A:2B:3C:4D:5E or 001A2B3C4D5E
Look up the manufacturer and vendor of any device by its MAC address OUI. Instantly identify network hardware makers. Free, fast, and private.
e.g. 00:1A:2B:3C:4D:5E or 001A2B3C4D5E
A MAC address (Media Access Control address) is a 48-bit identifier assigned to network interface controllers — Ethernet ports, Wi-Fi radios, Bluetooth chips. The first 24 bits, called the OUI (Organizationally Unique Identifier), identify the manufacturer. The remaining 24 bits are assigned by the manufacturer to specific devices. MAC addresses are typically displayed as six pairs of hex digits separated by colons or hyphens (00:1A:2B:3C:4D:5E).
Looking up the OUI portion of a MAC address reveals which company made the network hardware. The IEEE maintains the official OUI registry; commercial databases enrich this with model information for popular vendors (Apple iPhones, Cisco routers, Samsung devices). The registry is public and the lookups are free.
This tool extracts the OUI from a MAC address you provide and matches it against a current OUI database. Both colon and hyphen formats work, and addresses with or without separators are accepted.
Network troubleshooting frequently requires identifying which device on a network corresponds to a given MAC. Inventory tools, DHCP logs, and switch port tables list MAC addresses; mapping each to a manufacturer narrows down which physical device is involved without walking the data center.
Security investigations also rely on MAC lookup. Suspicious devices on a network can be partially identified by their OUI — a printer manufacturer's OUI on a workstation port suggests an unusual device. While MACs can be spoofed, the OUI is a useful first signal.
Paste the MAC, get the manufacturer.
MAC addresses are 48 bits (6 bytes). The first three bytes form the OUI, assigned by the IEEE Registration Authority. The IEEE publishes the OUI registry as a public database, updated regularly as new OUIs are assigned.
Bit 0 of the first byte indicates unicast (0) or multicast (1). Bit 1 indicates universally administered (0, by IEEE) or locally administered (1, by the network admin). Locally-administered addresses do not appear in the IEEE OUI registry; their bytes are chosen by the local network operator.
Some manufacturers register many OUIs (Apple has dozens). Lookup should match against the current registry rather than a cached snapshot, since assignments continue over time.