MAC Address Lookup
Identify any device manufacturer from its MAC address. Free, private, no signup.
Tool Interface
MAC address vendor lookup
How to use
- Paste a MAC address in any common format — colons, dashes, dots or plain hex.
- Press Look up. The vendor database (~1.7 MB) downloads once from a CDN and is then used fully offline.
- Use Batch lookup to identify many addresses at once.
- Vendors come from the IEEE OUI registry snapshot bundled with the open-source mac-oui-lookup package (MIT).
- "Unknown vendor" means the OUI is not in that registry snapshot (unregistered, very new, or locally administered).
Private by design — lookups run entirely in your browser. MAC addresses are never sent anywhere.
Rate this tool
About This Tool
Identify Any Device by Its MAC Address
The MAC Address Lookup identifies the vendor behind any network hardware address. Paste a MAC address in any common format (colons, dashes, dots or plain hex) and press Look up. The tool matches the OUI prefix against a vendor database and names the manufacturer.
The vendor database (about 1.7 MB) downloads once from a CDN and is then used fully offline. Vendors come from the IEEE OUI registry snapshot bundled with the open source mac-oui-lookup package (MIT). An "Unknown vendor" result means the OUI is not in that snapshot: unregistered, very new, or locally administered. Private by design: lookups run entirely in your browser and MAC addresses are never sent anywhere. The tool is free and needs no signup.
How to Use the MAC Address Lookup
Three steps to the vendor name.
- Paste a MAC address: Any format works: colons, dashes, dots or plain hex.
- Press Look up: The OUI prefix is matched against the vendor database.
- Read the vendor: See the manufacturer name, or use Batch lookup for many addresses at once.
Understanding MAC Addresses
- OUI prefix: The first half of a MAC identifies the vendor.
- IEEE registry: Vendors register OUIs with the IEEE, which publishes the list.
- Unknown vendor: Means unregistered, very new, or locally administered addresses.
- Batch mode: Paste many addresses, one per line, to identify them all.
Key Features
- Any input format: Colons, dashes, dots or plain hex all accepted.
- Batch lookup: Identify many addresses at once.
- Offline after first load: The database downloads once, then works fully offline.
- Open data: IEEE OUI registry via the open source mac-oui-lookup package.
- Private by design: MAC addresses are never sent anywhere.
Frequently Asked Questions (FAQ)
Is the MAC Address Lookup free? Yes. It is completely free with no signup.
What does Unknown vendor mean? The OUI is not in the registry snapshot: unregistered, very new, or locally administered.
Can I look up many addresses? Yes. Batch lookup handles a list, one MAC per line.
Where does the data come from? The IEEE OUI registry snapshot bundled with the open source mac-oui-lookup package.
Are my MAC addresses sent anywhere? No. Lookups run entirely in your browser.
Does it work offline? Yes, after the vendor database downloads on first use.
More Network Tools
Look up records with the DNS Lookup, check subnets with the Subnet Calculator, and explore the developer tools.