macvendor.io

Known source. Explainable result.

Find the registrant of a MAC address block.

Query official assignments and separate owner-curated claims using longest-prefix matching.

v0.7.936 → 28 → 24 bit

The first active match wins, so a /36 overrides an overlapping /28 or /24 without deleting either record.

Enter 12 hexadecimal characters or a colon-, hyphen-, or dot-separated MAC address.

Boundaries

We keep every claim precise.

An assignment is not a device identity

The result identifies a registry holder. A MAC address can be changed or randomized.

Sources remain separate

An owner-curated claim can never silently overwrite an authoritative assignment.

Every result is versioned

The active release and policy version are included in every API response.