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 the PSČ system was put into use, hence some differences from the 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 - the capital of Slovakia,
Bratislava. The second digit represents one of the five districts of Bratislava. The codes 860 01-899 99 are not assigned to any region and serve for internal purposes of the postal system.
9 - southern and western Slovakia: 911 01
Trenčín, 917 01
Trnava, 949 01
Nitra, 960 01
Zvolen, 974 01
Banská Bystrica, 984 01
Lučenec
0 - northern and eastern Slovakia: 010 01
Žilina, 036 01
Martin, 040 01 - 044 99
Košice, 058 01
Poprad, 071 01
Michalovce, 080 01
Prešov)..
Addresses with large mail traffic can get their own postal code.
When writing the address, the postal code is put in front of the town name; when typed or printed, 1 space separates the leading 3 digits from the trailing 2 digits, and 2 spaces separate the postal code from the town name, e.g.:
Na Příkopě 28
115 03 Praha 1
On postal items being sent from abroad it is recommended to prepend the postal code with the ISO 3166-1 two-letter code of the country and a dash:
Na Příkopě 28
CZ-115 03 Praha 1
the Czech Republic
On envelopes and postcards there are usually five rectangular boxes below the address field for the postal code digits.