MAC address lookup
Turn a MAC address into the device manufacturer behind it, straight from the IEEE OUI registry.
Look up a MAC address vendor
Lookups use the first three octets (the OUI) against the public IEEE registry. Locally administered or randomized MAC addresses have no registered vendor.
What the OUI tells you
The first three octets of a MAC address are the Organisationally Unique Identifier, assigned by the IEEE to the hardware vendor. Looking it up turns an anonymous address in your client list or DHCP table into a manufacturer, which helps you spot rogue devices, audit what is on the network, and identify gear during troubleshooting.
Good to know
- Modern phones use randomized MAC addresses, which have no registered vendor.
- The locally-administered bit (the second-least-significant bit of the first octet) marks a private address.
- Accepts full MACs or just the six-hex OUI prefix, with any separator.
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