![]() ![]() This narrows down the number of possible values for the MAC Address’s second hex character to just four. Where we are only concerned about identifying WiFi Clients using Locally Administered addresses, then we know our two bits of interest must be “10”. Locally Administered MAC Addresses for WiFi Clients This table shows all possible values of the second MAC Address character where a locally administered MAC Address is being used. Therefore, it is a locally administered address. In the example address 06-00-00-00-00-00 the most significant byte is 06 (hex), the binary form of which is 00000110, where the second least significant bit is 1. This means we can easily produce a table showing all possible values of a locally administered MAC Address. If it is 1, the address is administered locally. This means that any MAC Address where the penultimate bit of the first byte is ‘1’, is using a randomised or locally administered, MAC Address. Not a locally administered address, assigned to a group of devicesĪ locally administered address belonging to a specific deviceĪ locally administered address belonging to a group of devices Not a locally administered address, assigned to a specific device The second (right-most) of these two digits is used to show if this MAC address belongs to an individual device, or a group. The first (left-most) of these two digits is used to show if this is a Locally Administered MAC Address or not. The last two binary digits of the first byte control how the MAC address is perceived. ![]() ![]() ^^ These two values are what we're interested in ![]()
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