I need to track MAC address, which are hex based.
to be able to create a reliable "fill down" I created the following formual.

=dec2hex(hex2dec(A2)+2)

Takes the hex data from the above cell (A1), converts to decimal adds 2 then converts back to hex. but only works for 10 characters.

My problem is that the MAC adress is 12 characters long.
=dec2hex(hex2dec(C6)+2, 12)
responds with the "#NUM" error.


Is there a way to adjust character limit?