MAC address vendor lookup (OUI)
Find the manufacturer of a network device from its MAC address.
Calculated in your browser. Nothing is sent to our servers.
Paste a MAC address in any format, such as 00:0C:42:12:34:56, 00-0C-42-12-34-56 or 000c.4212.3456, to find the manufacturer from the IEEE registry. The tool also tells you whether the address is unicast or multicast and whether it is randomised, and converts it to other common formats. The search runs in your browser.
How it works
The first three bytes of a MAC address are the Organizationally Unique Identifier (OUI) that the IEEE assigns to each manufacturer. The tool compares them with the IEEE MA-L registry of more than 35,000 vendors.
Randomised and virtual MACs
If the second hex digit is 2, 6, A or E, the address is locally administered. Phones and laptops use random MAC addresses on Wi-Fi for privacy, and virtual machines and containers often use them too. These have no vendor.
Where to find MAC addresses
Switch MAC address tables, router ARP tables, DHCP leases and Wi-Fi controller client lists all show MAC addresses. Identifying unknown vendors is a quick way to spot unauthorised devices on your network.
Common questions
Can a MAC address identify a specific device?
It identifies the manufacturer of the network interface, not the device model or owner.
Why does my phone's MAC show no vendor?
Phones use randomised, locally administered MAC addresses on Wi-Fi for privacy, so there is no vendor to look up.
Is the vendor list up to date?
It is built from the public IEEE registry and refreshed when we update the site. Very new or small (MA-M, MA-S) assignments may not appear.
