Acutis MAC address lookup
Enter a MAC address and find out who made the device. The first half of every MAC is an OUI — a vendor block assigned by the IEEE. This checks it against the full registry, right in your browser.
What you get from a MAC
- Manufacturer (OUI) — the company the first 24 bits were assigned to. Great for spotting an unknown device on your network.
- Locally administered — if set, the MAC was made up locally (randomized privacy MAC, a VM, or a manual override) rather than burned in by a vendor.
- Unicast / multicast — whether it addresses one device or a group.
FAQ
What is a MAC address lookup?
It reads the first three bytes of a MAC address (the OUI) and matches them against the IEEE registry to identify the manufacturer that was assigned that block.
Why does my MAC address show no vendor?
Modern phones and laptops use randomized (locally administered) MAC addresses for privacy, so they aren't tied to a manufacturer and won't match the registry. Some vendors also register blocks as "Private" with no published name.
Can a MAC address tell me the exact device model?
No. The OUI only identifies the manufacturer, not the specific model or serial. It also shows whether the address is universally or locally administered and unicast or multicast.
Is this free and private?
Yes. It's free with no sign-up, the lookup runs entirely in your browser, and nothing you enter is stored or sent to a server.
Spotted a device you don't recognize?
A MAC tells you the maker. Acutis Networks tells you the whole story — it onboards every switch, AP and firewall, maps what's plugged into which port, and flags anything new the moment it appears. See Acutis Networks, or start with Acutis Go — free.
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