MAC vendor lookup
Find the manufacturer of a network device from its MAC address (OUI), and check whether an address is locally administered.
Runs in your browser · nothing is sentPorts, protocols & bandwidthNew
| Vendor | Raspberry Pi Foundation |
|---|---|
| Prefix (OUI) | B827EB |
How to use
- Enter a MAC address in any common format.
- Read the vendor, or the reason none was found.
- Use Fill in an example to try it with a known prefix.
Common scenarios
Look up the MAC address shown in your router’s client list to see which vendor made it.
MAC address formatter →A locally administered result usually means privacy MAC randomization, common on phones and laptops.
About this tool
Enter a MAC address to look up the manufacturer behind the first 3 bytes (the OUI, Organizationally Unique Identifier). The built-in list covers common network, cloud and consumer vendors, not the full IEEE registry, so an unknown result does not necessarily mean the vendor does not exist. A locally administered address (randomized Wi-Fi MAC, virtual machine) has no vendor by design.
🔒 Your input stays in your browser and is never sent anywhere.
Frequently asked questions
Why does it say the address has no vendor?
Either the prefix is not in the built-in list (which only covers common vendors), or the address is locally administered, meaning it was assigned by software rather than burned in by a hardware maker. Many phones randomize their Wi-Fi MAC address for privacy, which looks locally administered.
What is an OUI?
The Organizationally Unique Identifier is the first half (3 bytes) of a MAC address, assigned by the IEEE to a manufacturer. The rest of the address is assigned by that manufacturer to a specific device.
What to do next
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