Reduce the list, select first 2 letters of the city:
Listing cities (65 place(s)). Select the City to see the postcode(s):
Listing cities (65 place(s)). Select the City to see the postcode(s):
Position: Postcodes > Indonesia > North Sumatra > T.... >
Postcode finder: Indonesia, List of the cities starting with T. Indonesia North Sumatra Postcodes (Desktop version).