MAC Address Lookup

Find the vendor/manufacturer of a MAC address (OUI). Enter a MAC in any common format.

About MAC Address Lookup Tool

The MAC Address Lookup checks the OUI (Organizationally Unique Identifier) — the first 24 bits (first 6 hex digits) of a MAC address — against vendor registries to identify the device manufacturer.

Supported formats include 44:38:39:FF:EF:57, 44-38-39-FF-EF-57, and 443839FFEFE7. Only the OUI determines the vendor; randomized or locally administered MAC addresses may return “Not found”.

To use the tool, enter any MAC address and click Lookup. Results show the normalized MAC, the matched vendor (if available), and the OUI prefix.

Illustration for MAC vendor lookup