Reduce the list, select first 2 letters of the city:
Listing cities (23 place(s)). Select the City to see the postcode(s):
Listing cities (23 place(s)). Select the City to see the postcode(s):
Position: Postcodes > Germany > Baden-Württemberg > I.... >
Postcode finder: Germany, List of the cities starting with I. Germany Baden-Württemberg Postcodes (Desktop version).