Yugoslavianpostal codes were introduced on January 1, 1971 and consisted of five digits. The first two digits roughly corresponded to the routing zones, mostly matching each of the Yugoslav republics: 1, 2 and 3 forSerbia, 4 and 5 forCroatia, 6 forSlovenia, 7 forBosnia and Herzegovina, 8 forMontenegro and 9 forMacedonia. District seat cities usually had 000 as the last three digits, while smaller towns and villages had non-round last three digits.
Former Yugoslav postal codes are still used in the successor states ofSerbia andMontenegro.North Macedonia andSlovenia removed the first digit and the remaining four digits continue to be in use. InBosnia and Herzegovina, postal codes were adapted to new administrative structures.Croatia andKosovo have new postal code systems.
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