Where can I find the ignition key code

I lost my 2004 ford expedition car keys.. And the
Ford company said they don't go back to 2004. But
if I had my key code they would make me two keys
for $70. Compared to the only locksmith in town,
said he will charge me $150 for one key smh..
Please someone,  help I found a code near my left
front passenger seat.. One code was my key pad
lock code I was wondering was the other code the
ignition code is was 12 characters long with
numbers and letters.