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MAC Vendor Lookup — OUI Prefix Identifier

Identify network card vendors from MAC address prefixes (OUI) locally in your browser. Useful when unknown devices appear in ARP tables or during LAN asset review.

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MACOUIVendor
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Copy this tool URL or open the system share sheet on a supported device.

Use cases

  • Identify vendors for unfamiliar MACs in ARP tables
  • Review likely device sources on a LAN
  • Match OUI prefixes seen on switch ports

How to use

  1. Paste a full or partial MAC address
  2. Review the matched vendor information
  3. Continue tracing device ownership from the result

Example input and output

MAC

00:1A:2B:3C:4D:5E

Vendor

Vendor matched from OUI

FAQ

Does it require an online lookup?

No. Identification uses a local OUI dataset and does not call external lookup APIs.

What if no vendor is found?

It may be a private or randomized MAC, or a prefix not in the mini database. Cross-check with switch and device-side data.

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