MAC Address Vendor Lookup

Find the manufacturer of any MAC address from the official IEEE OUI registry — bulk lookup up to 100.

How do I find the manufacturer of a MAC address?

The first three bytes of a MAC address (the OUI) identify the manufacturer, assigned by the IEEE. Paste one or more MAC addresses in any format and the tool looks up each OUI in the IEEE registry to show the vendor and its country.

Why some MACs show no vendor

If the second hex digit is 2, 6, A or E, the address is locally administered — randomised by phones and laptops for Wi-Fi privacy, or assigned to virtual machines and containers — so it does not belong to a manufacturer. Use the MAC Address Formatter to inspect the bits.

Frequently asked questions

Where does the data come from?

The public IEEE MA-L (OUI) registry.

Can it identify the exact device?

No, only the manufacturer of the network card.

How many addresses can I check?

Up to 100 at once.