Free Online MAC Address Lookup
Find the manufacturer behind any MAC address or OUI prefix.
Manufacturer data comes from the public IEEE OUI database through a third-party lookup service. A MAC address identifies the network interface, not the person using it.
What the bits mean
About the MAC Address Lookup
A MAC address is a hardware identifier assigned to a network interface. The first three bytes are the Organizationally Unique Identifier (OUI), which is registered to the manufacturer. This tool looks up the OUI and returns the vendor name.
Common uses
- Identify an unknown device on a network.
- Check whether a network card is from the brand you expect.
- Investigate a device discovered during a security audit.
- Verify the vendor before adding a device to an allow list.
How to use this tool
- Enter a full MAC address or just the first six hex characters (the OUI).
- Click Look up.
- Read the manufacturer name and normalized address.
Frequently asked questions
Is a MAC address unique in the world?
In principle, a globally administered MAC address should be unique. In practice, virtualization, spoofing, and manufacturing errors can create duplicates.
Can I find a person from a MAC address?
No. The lookup only identifies the manufacturer. It does not reveal a user, owner, or physical location.
Why is my vendor lookup wrong?
Virtual machines, randomized Wi-Fi addresses, and locally administered addresses may not match a registered OUI, or the database may be outdated.