The postal code is a series, generally of numbers that relate to your home address, that allows the different postal companies to sort the correspondence by zones and then be distributed. In other words, it is a code, key or numerical figure that helps to identify a region or postal zone. The main purpose of a postal code is to provide the address of something specific, so that instead of having to read the full address, only the key and the letter or package are read and sent to the relevant post office in that area.
It should be noted that the postal code may vary depending on the country where it is, as an example of this we can mention countries such as Mexico, the United States and other countries use a five-number code; when in other countries they use four numbers. Another example is that of Canada where a combination of 3 digits and 3 interleaved letters is used or for its part in the United Kingdom they are also a mixture of numbers and letters, but that can vary.
According to the RAE, postal code is that relationship or group of numbers, formed from figures that have the functionality of keys, for the different areas, districts, towns, sectors, in order to be classified and distributed for the mail.
This postal code system originated or was implemented for the first time in Ukraine, which by then was part of the USSR in 1932, and then stopped using it in 1939. Years later, specifically in 1941 Germany introduced this system, to be followed by Argentina in 1958, then the United Kingdom in 1959, the United States in 1963 and Switzerland in 1964.
There are certain countries around the world that do not have this type of postal code, one of them is Ireland; But it is important to say that most countries have different mail services.
