ChistStudioWhy this is useful
When you're auditing devices connected to a network — reading a router's DHCP client list or a switch's MAC address table — the addresses alone are opaque. Resolving each to its manufacturer quickly tells you whether an unfamiliar device is a phone, a smart TV, a network appliance, or something that shouldn't be there at all.
Frequently asked questions
What part of a MAC address identifies the vendor?
The first three bytes form the Organizationally Unique Identifier (OUI), registered to a specific manufacturer by the IEEE. The remaining three bytes are assigned by that manufacturer per device.
Why does the vendor lookup show a generic result?
Many modern phones and laptops use MAC address randomization for privacy when scanning for Wi-Fi, generating a locally-administered address with no registered vendor — expected, not a failure.
Can two devices from different vendors share the same MAC address?
In principle no, but duplicates can occur from manufacturing errors, virtualization software reusing ranges, or spoofing — so a MAC address alone isn't a fully reliable identity mechanism.