 The first digit of a Polish postal code specifies the large area (postal region) to which the address concerned belongs.The numbers run clockwise around the map of Poland, from Warsaw (0) in the central east of the country, through east, south, west and north and then back to Łódź (9), close to the geographical centre of Poland.Each region is operated by one of the Poczta Polska's regional divisions ("oddział regionalny"), located in the following cities