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The six alphanumerical a combination of letters and numbers characters are prevalent in Postal Code unlike the five number-system prevalent in ZIP Codes. However both serve the same purpose of ensuring proper allocation of addresses and easy delivery. A number of countries makes use of only numbers for postal codes.

However, a couple of exceptions are also there, such as in Argentina, the UK, and Canada. On the contrary, some countries have adopted short codes, such as Iceland, which uses only three-digit postal code. Postal Codes or Zip Codes are a collection of numbers and also letters used for easy location and easy of delivery. All countries use postal codes and some countries use Zipcodes, the commonality is that both zipcode and postal code simplify the job of postmen.

The United States Postal Service started the journey in to accelerate the delivery process of a large volume of mail. He realized the requirement for an updated coding system with the belief that mail by train system would soon come to an end.

However, USPS convinced after almost 20 years and implemented the system. However, the USPS created the infrastructure of key mail processing centers suburbs of the major metropolitan locations. The main goal of Zip Codes or us Postal Codes is providing a better assistance in handling the ever-increasing count of mail in the US.

At that period, the utilization of ZIP Codes was not mandatory. Over the years, ZIP Codes become an essential social tool to organize and extract regional data. The basic format of a ZIP code is made up of five decimal numerical digits. The word ZIP code was primarily registered as a servicemark which is a kind of trademark of the United States. Postal Service, but their registration has long since expired. ZIP codes shows only delivery points that are within the United States and their dependencies, as well as the locations of their armed forces.

There are no ZIP codes that are kept as reserve for sending out mail that are bound for foreign destinations and therefore, international mails should not have a ZIP code written in their delivery address.

It is Important to note that the last line of a foreign address must only show the name of the country that it is to be delivered to. A postal code is a list of letters or numbers or letters and numbers joined together, sometimes thy would include spaces and punctuations that is included in a postal address for the sole purpose of sorting out the mail. On February , countries out of the member countries of the Universal Postal Union had their own postal code systems.

The development of postal codes shows clearly the increasing complexity of postal delivery as the population grew and the built environment keep getting more complex. This happened first in large cities. Postal codes began with regular postal district numbers or postal zone numbers within large cities. London was first that was subdivided into 10 districts in and Liverpool in was also subdivided in