Does this geolocate a device?

No. It only maps an OUI prefix to a manufacturer name when available.

Locally administered addresses (randomized) often have no useful vendor.

No key on our side; we proxy a free public vendor endpoint.

Free tool

MAC address / OUI vendor lookup

Free MAC address lookup: resolve the OUI vendor prefix for a MAC address using a public vendor API.

The first bytes of a MAC address (OUI) identify the vendor. This lookup queries a free public MAC vendor API for that prefix.

MACs are link-local identifiers. Randomized Wi‑Fi MACs may not map to a meaningful vendor. Do not treat OUI data as a person identifier.

Public vendor APIs may throttle. If a lookup fails, wait and retry. Results are informational.

See your public IP, ISP, ASN, and location instantly.

Geolocation, ISP, ASN, reverse DNS, WHOIS, and trust score.

Scan major DNSBL lists for an IP address.