MAC vendor lookup
Find who made a network device from its MAC address, using the IEEE public registry. Paste many at once; randomised private addresses and multicast addresses are pointed out.
Runs in your browser. Nothing you enter or upload is sent to us.
How to use it
Three steps
- Paste MAC addresses. Any format works: 3C:22:FB:12:34:56, 3c-22-fb-12-34-56 or 3c22.fb12.3456.
- Read the vendor. The first three bytes identify the maker, from the IEEE registry.
- Check the notes. Phones and laptops often use a randomised address for privacy; those have no vendor.
Questions
Good to know
How does it work?
Every maker buys address blocks from the IEEE. The first three bytes of a MAC address (the OUI) say which maker it is.
Why does a phone show no vendor?
Modern phones and laptops use a random, locally administered address on each Wi-Fi network for privacy. Those don't belong to any maker.
Is my list uploaded?
No. Only the small public list file for each address's first bytes is downloaded from this website.
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