Free MAC Address Lookup
Updated September 2026
Look up the manufacturer (OUI) of any MAC address. Identify network device vendors from the first 6 digits of any hardware address — free online tool.
Identifies the manufacturer (OUI) from the first 24 bits of a MAC address.
Verified Capabilities
Identifies the registered hardware manufacturer from the first 24 bits (OUI) of any MAC address.
Accepts colon, hyphen, dot, or no-separator MAC formats and normalizes them automatically.
Only the 6-character OUI prefix is sent to the lookup API — the device-specific last 6 characters of your MAC never leave your browser.
Cannot determine a device's physical location or owner. Modern phones randomize their MAC address per network for privacy, which makes device tracking by MAC unreliable.
The MAC Address Lookup handles work a browser alone can't do instantly, using Cloudflare's globally distributed edge network to process your request in seconds.
Look up the manufacturer (OUI) of any MAC address. Identify network device vendors from the first 6 digits of any hardware address — free online tool. Results are immediate — no waiting, no loading screens, no account required.
Who uses the MAC Address Lookup?
- Network administrators identifying unknown devices connected to their enterprise network.
- IT support technicians confirming a device's manufacturer when diagnosing connectivity issues.
- Security analysts investigating suspicious ARP entries or rogue devices on Wi-Fi.
Common uses and search terms
The MAC Address Lookup is frequently used for: mac address, oui lookup, mac vendor. Whether you need a quick result or are working through a longer project, the tool handles all common variations without any configuration.
Why use Allio Tools's MAC Address Lookup?
Your input is sent securely to Cloudflare's edge network for processing — it is never stored, logged, or shared with any third party, and is discarded immediately after your result is returned. Free use is capped at 5 per day, since this tool relies on paid backend infrastructure to run — Pro removes the daily limit. No account is required for the free tier. Available in 11 languages and optimised for all screen sizes, the MAC Address Lookup works on desktop, tablet, and mobile with no app download needed.
See also:IP Address Lookup · Website Speed Test · DNS Lookup
How the MAC Address Lookup works
Enter a MAC address in any format (00:1A:2B:3C:4D:5E, 00-1A-2B-3C-4D-5E, or 001A2B3C4D5E).
Click Look Up to identify the network hardware manufacturer registered to that OUI prefix.
The first 24 bits (3 bytes) of a MAC identify the manufacturer; the last 24 bits are device-unique.
Use this to identify unknown devices on your network from router ARP tables.
Tips & tricks
- The lookup only tells you the hardware manufacturer, not the specific device model — a Dell OUI could be a laptop, a monitor, or a network switch; cross-reference the device name in your router's client list for more detail.
- If a lookup returns "Unknown / Not registered", the address is likely locally administered or randomized (common on modern phones for Wi-Fi privacy) rather than a real manufacturer-assigned OUI — check the Notes field for a "Locally administered" flag before assuming the lookup failed.
- OUI registrations occasionally change hands through corporate acquisitions, so a very old device might show the manufacturer that originally registered the block rather than the brand printed on the hardware.
Frequently Asked Questions
What is a MAC address?
A MAC (Media Access Control) address is a 48-bit hardware identifier assigned to every network interface (Wi-Fi card, ethernet port, Bluetooth chip). It's expressed as 6 pairs of hexadecimal digits: 00:1A:2B:3C:4D:5E.
What is an OUI?
OUI (Organizationally Unique Identifier) is the first 24 bits (3 bytes) of a MAC address. IEEE assigns OUI blocks to manufacturers. Looking up the OUI identifies which company made the network hardware.
Can I find the physical location of a device from its MAC address?
No. MAC addresses identify the hardware manufacturer, not the device owner or location. They operate at Layer 2 (local network) and are not routed over the internet, so geolocation from MAC alone is impossible.
Can MAC addresses be spoofed?
Yes. Most operating systems allow changing the MAC address in software (MAC spoofing). On modern iOS and Android, MAC addresses are randomized per network by default for privacy, making device tracking by MAC unreliable.
How do I find a device's MAC address?
Windows: ipconfig /all. Mac/Linux: ifconfig or ip link. Smartphones: Settings > About > Wi-Fi Address. Your router admin panel shows MAC addresses of all connected devices in the DHCP client table.
Is my data safe when using the MAC Address Lookup?
Yes. Your input is processed on Cloudflare's globally distributed edge network. Data is used only to generate your result and is never stored, logged, or shared with any third party.
How current is the data returned by the MAC Address Lookup?
The MAC Address Lookup fetches live data in real time each time you run it. Results reflect the current state of the server or domain at the moment of the request.
Why does the MAC Address Lookup sometimes return different results than other tools?
Results depend on the real-time state of the target server and DNS propagation, which can vary by geographic region and caching TTL. If you see inconsistencies, wait a few minutes and re-test — DNS changes can take up to 48 hours to propagate fully worldwide.
Works with ChatGPT, Claude, Cursor, GitHub Copilot, VS Code, Poe and more — 106+ tools, zero data collection.