Network
MAC address lookup
Match the longest vendor prefix using a bundled OUI registry; your MAC never leaves the browser.
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Using this tool
Inspect a vendor prefix or address flags using the local registry.
Actions: Look up vendor
Example
A synthetic locally administered address does not identify a unique vendor; the output makes this explicit.
Example action and settings
Action: Look up vendor
Input / action
02:00:00:12:34:56
Result / expected behavior
MAC: 02:00:00:12:34:56 Assignment: Locally administered Transmission: Unicast Matched prefix: — Vendor: Local / multicast addresses do not identify a unique vendor.
Scope and limitations
- Only the bundled registry snapshot is queried, without online updates; local or multicast addresses skip vendor matching.
Common mistakes
- An assignment record does not prove device identity; MACs can change and a missing vendor does not invalidate an address.
Related tools
MAC address generator IPv6 ULA generator
Privacy and browser support
Input is processed in this browser. Do not use real keys or active sensitive credentials as demonstration data. Device features require browser support and your permission.