So, why 02 , 06 , 0A , or 0E ? These specific patterns ensure that the U/L bit is correctly set to 1, designating the address as locally administered. For a unicast address (which is the standard for a single network interface card), the least significant bit (the I/G bit) must be zero. The valid first octets that satisfy the "locally administered unicast" condition are therefore even numbers like 02 , 06 , 0A , and 0E. This strict validation is enforced by both the Windows OS and many network drivers to prevent MAC address conflicts on local networks. The widespread 02 workaround you see is simply the most minimal valid change one can make from the typical 00` first octet often seen in factory MAC addresses.

= Universally Administered (assigned by the manufacturer/IEEE). Locally Administered (assigned by the user or network admin).

Now go ahead—set that first octet, and make the change work.

Common tools

First Octet Work: Failed To Change Mac Address For Wireless Network Connection Set The

So, why 02 , 06 , 0A , or 0E ? These specific patterns ensure that the U/L bit is correctly set to 1, designating the address as locally administered. For a unicast address (which is the standard for a single network interface card), the least significant bit (the I/G bit) must be zero. The valid first octets that satisfy the "locally administered unicast" condition are therefore even numbers like 02 , 06 , 0A , and 0E. This strict validation is enforced by both the Windows OS and many network drivers to prevent MAC address conflicts on local networks. The widespread 02 workaround you see is simply the most minimal valid change one can make from the typical 00` first octet often seen in factory MAC addresses.

= Universally Administered (assigned by the manufacturer/IEEE). Locally Administered (assigned by the user or network admin). So, why 02 , 06 , 0A , or 0E

Now go ahead—set that first octet, and make the change work. The valid first octets that satisfy the "locally

Common tools