Instantly resolve IEEE Organizationally Unique Identifiers (OUI) to identify hardware manufacturers like Apple, Cisco, Intel, Samsung, and Raspberry Pi from MAC addresses with unicast and multicast scope detection.
Runs entirely in your browser
Every network interface has a MAC address, and the first half of that address is an Organizationally Unique Identifier (OUI) assigned by the IEEE to the hardware’s manufacturer. That means a MAC address quietly tells you who made the device. This tool resolves the OUI to identify the vendor — Apple, Cisco, Intel, Samsung, Raspberry Pi and thousands of others — and detects whether the address is unicast or multicast and locally or globally administered.
It is handy when you are auditing what is connected to a network: an unfamiliar device in a DHCP lease list or an ARP table becomes far less mysterious once you know its manufacturer. Network administrators use it to inventory hardware, spot rogue or unexpected devices, and make sense of packet captures.
The lookup runs in your browser against the OUI registry, so you can check addresses from your own network without sending them anywhere. Keep in mind that modern phones and laptops often randomise their MAC address for privacy, so a randomised address may not resolve to a real vendor — which is itself a useful signal.
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