Reduce the list, select first 2 letters of the city:
Listing cities (44 place(s)). Select the City to see the postcode(s):
Listing cities (44 place(s)). Select the City to see the postcode(s):
Position: Postcodes > Peru > San Martin > H.... >
Postcode finder: Peru, List of the cities starting with H. Peru San Martin Postcodes (Desktop version).