When you see an error about the "first octet" while trying to change a wireless MAC address, it is because
Double-click NetworkAddress and enter your new 12-digit MAC address. Remember to make the second character 2 , 6 , A , or E .
This guide breaks down exactly why this error happens, the underlying networking logic, and the practical steps required to successfully spoof your wireless MAC address. Why Is the First Octet Restricted?
Inside this key, you will see several subfolders labeled 0001 , 0002 , 0003 , etc. Click through them until you find the one where the DriverDesc value matches the name of your wireless adapter. When you see an error about the "first
Navigate to the following path: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\4d36e972-e325-11ce-bfc1-08002be10318
If you applied the first octet rule and your connection still fails, check for these secondary issues:
If the changes still aren't working, consider these points: Why Is the First Octet Restricted
Here is an explanation of why this happens and how to fix it. The Problem: The Multicast/Unicast Rule
Instead of using a random MAC address, force the first octet to a valid locally administered unicast value.
Right-click your wireless card (e.g., Intel Wi-Fi 6E AX211 ) and select . Navigate to the Advanced tab. Navigate to the Advanced tab. Android
A MAC address is 6 bytes (48 bits). The first byte contains two special single-bit flags (bits numbered from least significant bit (LSB) upward in each byte):
Right-click your wireless network card (e.g., Intel(R) Wi-Fi 6E AX211 ) and select . Navigate to the Advanced tab.
Android