A MAC address consists of two parts:
- The Organizationally Unique Identifier (OUI), which is the first three octets of the address.
- A 24-bit number assigned by the OUI holder.
The IEEE maintains a public listing of OUIs mapped to vendor names. Tools like WiFi Analyzer use this data to identify and name access points (APs) correctly. To ensure accurate detection of current AP models, the oui.txt file must be updated regularly.
Why Update the oui.txt File?
Updating the oui.txt file ensures your WiFi Analyzer can correctly identify new devices and vendors. Without updates, your network analysis may show outdated or incorrect vendor names.
Steps to Update oui.txt
- Download the Latest OUI File
- Right-click this link: IEEE OUI Listing
- Choose Save File As… and save it as oui.txt.
Tip: If the right-click option isn’t available, load the entire page, wait for it to fully load, and then save the page as a text file named oui.txt.
- Copy the File to the Correct Directory
- Navigate to:
C:\Program Files (x86)\AirMagnet Inc\AirMagnet LaptopOUI - Replace the existing oui.txt file with the new one.
- Navigate to: