Postal codes in Czech Republic

Postal codes in the Czech Republic are called PSČ (PSČ, stands for Czech: Poštovní směrovací číslo, pronounced [ˈpoʃtovɲiː ˈsmɲɛrovatsiː ˈtʃiːslo] - postal routing number). The acronym is commonly pronounced as a word ([ˈpəsətʃə]), rather than separate letters ([ˈpɛː.ɛs.tʃɛː]). The system was introduced in former Czechoslovakia in 1973 and has remained unchanged. The postal code consists of five digits, usually written with a space in the form XXX XX. The first digit indicates a region (i.e. regions of Czechoslovakia as of the time when PSČ system went in use, hence some differences from current administrative divisions):

1 - the capital of the Czech Republic, Prague (second digit represents one of 10 Prague districts, so e.g. 160 00 is the main post office in Prague 6 - Dejvice).
2 - central Bohemia (272 01 Kladno, 280 01 Kolín). Numbers 200 00 - 249 99 are reserved for internal needs of the postal system itself and are not assigned to any region. The Prague central distribution post office uses 225 00.
3 - western and southern Bohemia (301 00 - 326 00 Plzeň, 360 01 Karlovy Vary, 370 01 České Budějovice)
4 - northern Bohemia (400 01 Ústí nad Labem, 460 01 Liberec)
5 - eastern Bohemia and western Moravia (500 01 Hradec Králové, 530 01 Pardubice, 541 01 Trutnov, 586 01 Jihlava)
6 - southern Moravia (600 00 - 659 99 Brno, 690 01 Břeclav)
7 - eastern and northern Moravia (779 00 Olomouc, 760 01 Zlín, 700 01 - 729 99 Ostrava)
8,9,0 are assigned to Slovakia.

...
Wikipedia