Reduce the list, select first 2 letters of the city:
Listing cities (22 place(s)). Select the City to see the postcode(s):
Listing cities (22 place(s)). Select the City to see the postcode(s):
Position: Postcodes > United States > Colorado > A.... >
Postcode finder: United States, List of the cities starting with A. United States Colorado Postcodes (Desktop version).