most Ford radios if their serial number begins with a C, L,or M or the 7 digit type found on very old models. Obtaining the code from the serial number saves you the hassle and cost of sending me those models provided the radio has not locked-up due to excessive code entry attempts or had it's code changed in the past. If your radio has locked up, please do enquire.
Examples of serial numbers are:
M123456
C123456
L123456
1234567