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Why can't I spoof my wifi card's MAC address to 1F:2E:3D:4C:5B:6A. Is that address invalid?

root@:~# ifconfig wlan0 down
root@:~# ifconfig wlan0 hw ether 1f:2e:3d:4c:5b:6a
SIOCSIFHWADDR: Cannot assign requested address
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As explained in this AskUbuntu question/answer, a unicast MAC address' first octet (your 1f) has to be even.

Since 1f (31) is not even, you can't assign it.

  • Ok. I'm sorry for it. I'm new in here. – user825347 May 3 '18 at 14:31
  • @user825347 No worries :-) – Kusalananda May 3 '18 at 14:35

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