Find the organization behind a MAC address or OUI prefix in the IEEE registries. No auth, no key.
Listed on
First seen 2 Oct 2026. One server, whatever directories list it: each directory listing keeps its own page and history.
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Tools
From an anonymous probe
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Tools
| Tool | Description | Behaviour |
|---|---|---|
| lookup | Resolve a MAC address or OUI prefix to its registered organization using longest-prefix match across the MA-L, MA-M, MA-S, IAB, and CID registries. Reports the block type, address count, registration country, and a link to the full record page. Randomized and locally administered addresses usually have no registered organization. | Read-only |
| Directory | Listing | Tier | First seen |
|---|---|---|---|
| Official MCP Registry | MAC Address Lookup | - | 2 Oct 2026 |