What is "Postal code/zip code of Serbia(Yugoslavia)"?

Answer 1

Serbia is a country.
A country does not have a zip code.
You do need a country code when you make a phone call to any other country.

This page lists all the zip codes for cities in Serbia.
http://en.wikipedia.org/wiki/List_of_postal_codes_in_Serbia

Here are the telephone codes for Serbia.
To call Serbia 011-381
http://www.1areacodescountrycodes.com/international-country-codes-city-calling-code-serbia.htm

Answer 2

A UK postcode is either 6,7 or 8digits and numbers long. The first letter or two letters refers to the city, town or closest area. For example, Manchester is M, Birmingham is B and Bristol is BS. This doesn't apply to London, though, where the postcodes are things like SW (for south west). Then, it's a number or 2. This refers to the district. Manchester city centre is M60 (it is not 60 miles from the centre, like someone else suggested!) or M1, depending on which part of the city. Then there is a number- this refers to a smaller region within the area. Then there are 2 letters that refer to an exact building or collection of buildings. Normally, some of the houses down the same road will share a postcode. There are 57,000,000 people in England- there's no way we could have one postcode. It wouldn't make sense!

Answer 3

90210