MAC Address Lookup
Identify the hardware manufacturer behind any MAC address from its OUI prefix. Paste a MAC address to see the registered vendor.
About MAC address lookups
Every network interface — a laptop's Wi-Fi card, a phone, a router — ships with a MAC address, a 48-bit hardware identifier. The first 24 bits, known as the OUI (Organizationally Unique Identifier), are assigned by the IEEE to the company that made the hardware. This tool looks that OUI up and returns the manufacturer.
Identifying the vendor behind a MAC address is useful for network inventory and troubleshooting — spotting unknown devices on a network, confirming which manufacturer a device came from, or matching hardware to a purchase. You only need the first six hex digits (the OUI) for the lookup, though pasting the full address works too.
Frequently asked questions
How do I find the manufacturer of a MAC address?
Paste the MAC address (or just its first six hex digits, the OUI) above. nettools.me looks the OUI up against the IEEE registry and returns the hardware vendor that owns that prefix.
What is an OUI?
The Organizationally Unique Identifier is the first 24 bits (three bytes) of a MAC address. The IEEE assigns each OUI to a manufacturer, so it identifies who made the network interface.