macadress

What it does

Look beyond the vendor name. Understand MAC addresses with IEEE block data, device-category clues, privacy-randomization signals and plain-English reasoning. Use it through the free lookup, JSON API, bulk databases, log extractor, MCP or self-hosted deployment.

Free MAC vendor lookup and OUI lookup: find the registered vendor, IEEE assignment, block range, country and address type of any MAC address or OUI. No account required.

Use this MAC vendor lookup and OUI lookup to find a MAC address's registered organization, IEEE assignment, block range, country, and address type. We also identify locally administered addresses and flag when one may be randomized. The web lookup is free and requires no account, in any format: colons, dashes, dots, or none at all. The API includes 1,000 free lookups a month, with paid plans for production volume. Every lookup gets this: not just a vendor name, but the reasoning behind it. This one's live, pulled from the registry on every page load. The MAC vendor lookup above is free, unlimited, no account required. Production traffic and environments where lookups can't leave the network…from macadress.com

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